125561974 has 4 divisors (see below), whose sum is σ = 188342964. Its totient is φ = 62780986.

The previous prime is 125561963. The next prime is 125561981. The reversal of 125561974 is 479165521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479165521 = 29 ⋅16522949.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31390492 + ... + 31390495.

It is an arithmetic number, because the mean of its divisors is an integer number (47085741).

Almost surely, 2^125561974 is an apocalyptic number.

125561974 is a deficient number, since it is larger than the sum of its proper divisors (62780990).

125561974 is an equidigital number, since it uses as much as digits as its factorization.

125561974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62780989.

The product of its digits is 75600, while the sum is 40.

The square root of 125561974 is about 11205.4439447975. The cubic root of 125561974 is about 500.7481785659.

The spelling of 125561974 in words is "one hundred twenty-five million, five hundred sixty-one thousand, nine hundred seventy-four".