125503440 has 80 divisors (see below), whose sum is σ = 392915328. Its totient is φ = 33136128.

The previous prime is 125503423. The next prime is 125503447. The reversal of 125503440 is 44305521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×125503440² = 31502226903667200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 125503440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125503447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22182 + ... + 27258.

Almost surely, 2^125503440 is an apocalyptic number.

125503440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125503440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196457664).

125503440 is an abundant number, since it is smaller than the sum of its proper divisors (267411888).

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

125503440 is a wasteful number, since it uses less digits than its factorization.

125503440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196 (or 5190 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 125503440 is about 11202.8317848658. The cubic root of 125503440 is about 500.6703541822.

Adding to 125503440 its reverse (44305521), we get a palindrome (169808961).

The spelling of 125503440 in words is "one hundred twenty-five million, five hundred three thousand, four hundred forty".