42254991 has 6 divisors (see below), whose sum is σ = 61035000. Its totient is φ = 28169988.

The previous prime is 42254981. The next prime is 42255053. The reversal of 42254991 is 19945224.

42254991 is a `hidden beast` number, since 4 + 22 + 549 + 91 = 666.

It is not a de Polignac number, because 42254991 - 2²³ = 33866383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42254921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2347491 + ... + 2347508.

It is an arithmetic number, because the mean of its divisors is an integer number (10172500).

Almost surely, 2^42254991 is an apocalyptic number.

42254991 is a deficient number, since it is larger than the sum of its proper divisors (18780009).

42254991 is a wasteful number, since it uses less digits than its factorization.

42254991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695005 (or 4695002 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 42254991 is about 6500.3839117394. The cubic root of 42254991 is about 348.3047024129.

It can be divided in two parts, 4225 and 4991, that added together give a square (9216 = 96²).

The spelling of 42254991 in words is "forty-two million, two hundred fifty-four thousand, nine hundred ninety-one".