42925551 has 4 divisors (see below), whose sum is σ = 57234072. Its totient is φ = 28617032.

The previous prime is 42925489. The next prime is 42925573. The reversal of 42925551 is 15552924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42925551 - 2¹⁹ = 42401263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42925591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7154256 + ... + 7154261.

It is an arithmetic number, because the mean of its divisors is an integer number (14308518).

Almost surely, 2^42925551 is an apocalyptic number.

42925551 is a deficient number, since it is larger than the sum of its proper divisors (14308521).

42925551 is a wasteful number, since it uses less digits than its factorization.

42925551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14308520.

The product of its digits is 18000, while the sum is 33.

The square root of 42925551 is about 6551.7593820286. The cubic root of 42925551 is about 350.1374997168.

The spelling of 42925551 in words is "forty-two million, nine hundred twenty-five thousand, five hundred fifty-one".