77142425 has 12 divisors (see below), whose sum is σ = 95785536. Its totient is φ = 61630800.

The previous prime is 77142419. The next prime is 77142433. The reversal of 77142425 is 52424177.

It is not a de Polignac number, because 77142425 - 2⁴ = 77142409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77142391 and 77142400.

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, 22580 + ... + 25770.

It is an arithmetic number, because the mean of its divisors is an integer number (7982128).

Almost surely, 2^77142425 is an apocalyptic number.

It is an amenable number.

77142425 is a deficient number, since it is larger than the sum of its proper divisors (18643111).

77142425 is a wasteful number, since it uses less digits than its factorization.

77142425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4163 counting only the distinct ones).

The product of its digits is 15680, while the sum is 32.

The square root of 77142425 is about 8783.0760556880. The cubic root of 77142425 is about 425.6942286961.

The spelling of 77142425 in words is "seventy-seven million, one hundred forty-two thousand, four hundred twenty-five".