91255042 has 8 divisors (see below), whose sum is σ = 137010636. Its totient is φ = 45584832.

The previous prime is 91255039. The next prime is 91255049. The reversal of 91255042 is 24055219.

It can be written as a sum of positive squares in 2 ways, for example, as 84437721 + 6817321 = 9189^2 + 2611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 91255042.

It is not an unprimeable number, because it can be changed into a prime (91255049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18603 + ... + 22990.

Almost surely, 2^91255042 is an apocalyptic number.

91255042 is a deficient number, since it is larger than the sum of its proper divisors (45755594).

91255042 is a wasteful number, since it uses less digits than its factorization.

91255042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42692.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 91255042 is about 9552.7504939677. The cubic root of 91255042 is about 450.2139591592.

The spelling of 91255042 in words is "ninety-one million, two hundred fifty-five thousand, forty-two".