42455290 has 16 divisors (see below), whose sum is σ = 80915112. Its totient is φ = 15983104.

The previous prime is 42455269. The next prime is 42455293. The reversal of 42455290 is 9255424.

It can be written as a sum of positive squares in 4 ways, for example, as 42367081 + 88209 = 6509^2 + 297^2 .

It is not an unprimeable number, because it can be changed into a prime (42455293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124699 + ... + 125038.

Almost surely, 2^42455290 is an apocalyptic number.

42455290 is a deficient number, since it is larger than the sum of its proper divisors (38459822).

42455290 is a wasteful number, since it uses less digits than its factorization.

42455290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249761.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 42455290 is about 6515.7724024094. The cubic root of 42455290 is about 348.8541849458.

The spelling of 42455290 in words is "forty-two million, four hundred fifty-five thousand, two hundred ninety".