125397990 has 32 divisors (see below), whose sum is σ = 334395360. Its totient is φ = 33439392.

The previous prime is 125397989. The next prime is 125397991. The reversal of 125397990 is 99793521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125397989) and next prime (125397991).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125397991) 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, 231949 + ... + 232488.

It is an arithmetic number, because the mean of its divisors is an integer number (10449855).

Almost surely, 2^125397990 is an apocalyptic number.

125397990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125397990 is an abundant number, since it is smaller than the sum of its proper divisors (208997370).

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

125397990 is a wasteful number, since it uses less digits than its factorization.

125397990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464453 (or 464447 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 125397990 is about 11198.1243965228. The cubic root of 125397990 is about 500.5300911415.

The spelling of 125397990 in words is "one hundred twenty-five million, three hundred ninety-seven thousand, nine hundred ninety".