125771490 has 72 divisors (see below), whose sum is σ = 354137940. Its totient is φ = 30955392.

The previous prime is 125771489. The next prime is 125771531. The reversal of 125771490 is 94177521.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 36978561 + 88792929 = 6081^2 + 9423^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11076 + ... + 19344.

Almost surely, 2^125771490 is an apocalyptic number.

125771490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125771490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177068970).

125771490 is an abundant number, since it is smaller than the sum of its proper divisors (228366450).

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

125771490 is a wasteful number, since it uses less digits than its factorization.

125771490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308 (or 8292 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 125771490 is about 11214.7888968094. The cubic root of 125771490 is about 501.0265443046.

The spelling of 125771490 in words is "one hundred twenty-five million, seven hundred seventy-one thousand, four hundred ninety".