125899620 has 288 divisors, whose sum is σ = 475735680. Its totient is φ = 24514560.

The previous prime is 125899619. The next prime is 125899621. The reversal of 125899620 is 26998521.

It is an interprime number because it is at equal distance from previous prime (125899619) and next prime (125899621).

It is a super-2 number, since 2×125899620² = 31701428632288800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (125899621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 549666 + ... + 549894.

It is an arithmetic number, because the mean of its divisors is an integer number (1651860).

Almost surely, 2^125899620 is an apocalyptic number.

125899620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 11220×11221.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125899620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237867840).

125899620 is an abundant number, since it is smaller than the sum of its proper divisors (349836060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125899620 is a wasteful number, since it uses less digits than its factorization.

125899620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 125899620 is about 11220.4999888597. The cubic root of 125899620 is about 501.1966272153.

The spelling of 125899620 in words is "one hundred twenty-five million, eight hundred ninety-nine thousand, six hundred twenty".