42777625 has 32 divisors (see below), whose sum is σ = 59439744. Its totient is φ = 30472000.

The previous prime is 42777617. The next prime is 42777629. The reversal of 42777625 is 52677724.

It is not a de Polignac number, because 42777625 - 2³ = 42777617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42777629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72582 + ... + 73168.

It is an arithmetic number, because the mean of its divisors is an integer number (1857492).

Almost surely, 2^42777625 is an apocalyptic number.

It is an amenable number.

42777625 is a deficient number, since it is larger than the sum of its proper divisors (16662119).

42777625 is a wasteful number, since it uses less digits than its factorization.

42777625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 656 counting only the distinct ones).

The product of its digits is 164640, while the sum is 40.

The square root of 42777625 is about 6540.4606106910. The cubic root of 42777625 is about 349.7348331688.

Subtracting 42777625 from its reverse (52677724), we obtain a palindrome (9900099).

The spelling of 42777625 in words is "forty-two million, seven hundred seventy-seven thousand, six hundred twenty-five".