90901245 has 32 divisors (see below), whose sum is σ = 148838400. Its totient is φ = 47361600.

The previous prime is 90901171. The next prime is 90901249. The reversal of 90901245 is 54210909.

It is a happy number.

It is not a de Polignac number, because 90901245 - 2¹⁰ = 90900221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90901249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151456 + ... + 152054.

It is an arithmetic number, because the mean of its divisors is an integer number (4651200).

Almost surely, 2^90901245 is an apocalyptic number.

It is an amenable number.

90901245 is a deficient number, since it is larger than the sum of its proper divisors (57937155).

90901245 is a wasteful number, since it uses less digits than its factorization.

90901245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 90901245 is about 9534.2144406343. The cubic root of 90901245 is about 449.6313771330.

The spelling of 90901245 in words is "ninety million, nine hundred one thousand, two hundred forty-five".