76972145 has 12 divisors (see below), whose sum is σ = 96560436. Its totient is φ = 58898400.

The previous prime is 76972139. The next prime is 76972157. The reversal of 76972145 is 54127967.

It can be written as a sum of positive squares in 2 ways, for example, as 9928801 + 67043344 = 3151^2 + 8188^2 .

It is not a de Polignac number, because 76972145 - 2⁸ = 76971889 is a prime.

It is a super-2 number, since 2×76972145² = 11849422211802050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11906 + ... + 17195.

It is an arithmetic number, because the mean of its divisors is an integer number (8046703).

Almost surely, 2^76972145 is an apocalyptic number.

It is an amenable number.

76972145 is a deficient number, since it is larger than the sum of its proper divisors (19588291).

76972145 is a wasteful number, since it uses less digits than its factorization.

76972145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29152 (or 29129 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 76972145 is about 8773.3770578951. The cubic root of 76972145 is about 425.3807798447.

The spelling of 76972145 in words is "seventy-six million, nine hundred seventy-two thousand, one hundred forty-five".