125972771 has 16 divisors (see below), whose sum is σ = 139968000. Its totient is φ = 112768128.

The previous prime is 125972767. The next prime is 125972851. The reversal of 125972771 is 177279521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125972771 - 2² = 125972767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125972711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77000 + ... + 78618.

It is an arithmetic number, because the mean of its divisors is an integer number (8748000).

Almost surely, 2^125972771 is an apocalyptic number.

125972771 is a deficient number, since it is larger than the sum of its proper divisors (13995229).

125972771 is a wasteful number, since it uses less digits than its factorization.

125972771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858.

The product of its digits is 61740, while the sum is 41.

The square root of 125972771 is about 11223.7592187288. The cubic root of 125972771 is about 501.2936779081.

The spelling of 125972771 in words is "one hundred twenty-five million, nine hundred seventy-two thousand, seven hundred seventy-one".