125399442 has 16 divisors (see below), whose sum is σ = 286627392. Its totient is φ = 35828400.

The previous prime is 125399437. The next prime is 125399447. The reversal of 125399442 is 244993521.

It is an interprime number because it is at equal distance from previous prime (125399437) and next prime (125399447).

It is a super-2 number, since 2×125399442² = 31450040107822728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125399442.

It is not an unprimeable number, because it can be changed into a prime (125399447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1492809 + ... + 1492892.

It is an arithmetic number, because the mean of its divisors is an integer number (17914212).

Almost surely, 2^125399442 is an apocalyptic number.

125399442 is an abundant number, since it is smaller than the sum of its proper divisors (161227950).

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

125399442 is a wasteful number, since it uses less digits than its factorization.

125399442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985713.

The product of its digits is 77760, while the sum is 39.

The square root of 125399442 is about 11198.1892286208. The cubic root of 125399442 is about 500.5320230355.

The spelling of 125399442 in words is "one hundred twenty-five million, three hundred ninety-nine thousand, four hundred forty-two".