42777125 has 16 divisors (see below), whose sum is σ = 55710720. Its totient is φ = 32731600.

The previous prime is 42777109. The next prime is 42777127. The reversal of 42777125 is 52177724.

It is not a de Polignac number, because 42777125 - 2⁴ = 42777109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42777127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4565 + ... + 10314.

It is an arithmetic number, because the mean of its divisors is an integer number (3481920).

Almost surely, 2^42777125 is an apocalyptic number.

It is an amenable number.

42777125 is a deficient number, since it is larger than the sum of its proper divisors (12933595).

42777125 is a wasteful number, since it uses less digits than its factorization.

42777125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14917 (or 14907 counting only the distinct ones).

The product of its digits is 27440, while the sum is 35.

The square root of 42777125 is about 6540.4223869717. The cubic root of 42777125 is about 349.7334705554.

The spelling of 42777125 in words is "forty-two million, seven hundred seventy-seven thousand, one hundred twenty-five".