77142475 has 12 divisors (see below), whose sum is σ = 96020640. Its totient is φ = 61479200.

The previous prime is 77142469. The next prime is 77142479. The reversal of 77142475 is 57424177.

It is not a de Polignac number, because 77142475 - 2⁷ = 77142347 is a prime.

It is a super-2 number, since 2×77142475² = 11901922898251250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77142479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 990 + ... + 12460.

It is an arithmetic number, because the mean of its divisors is an integer number (8001720).

Almost surely, 2^77142475 is an apocalyptic number.

77142475 is a deficient number, since it is larger than the sum of its proper divisors (18878165).

77142475 is a wasteful number, since it uses less digits than its factorization.

77142475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11750 (or 11745 counting only the distinct ones).

The product of its digits is 54880, while the sum is 37.

The square root of 77142475 is about 8783.0789020707. The cubic root of 77142475 is about 425.6943206676.

The spelling of 77142475 in words is "seventy-seven million, one hundred forty-two thousand, four hundred seventy-five".