90901251 has 16 divisors (see below), whose sum is σ = 153907200. Its totient is φ = 51943464.

The previous prime is 90901249. The next prime is 90901289. The reversal of 90901251 is 15210909.

It is a happy number.

It is not a de Polignac number, because 90901251 - 2¹ = 90901249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (90901751) 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, 240291 + ... + 240668.

It is an arithmetic number, because the mean of its divisors is an integer number (9619200).

Almost surely, 2^90901251 is an apocalyptic number.

90901251 is a deficient number, since it is larger than the sum of its proper divisors (63005949).

90901251 is a wasteful number, since it uses less digits than its factorization.

90901251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480975 (or 480969 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 90901251 is about 9534.2147552905. The cubic root of 90901251 is about 449.6313870257.

The spelling of 90901251 in words is "ninety million, nine hundred one thousand, two hundred fifty-one".