90155145 has 8 divisors (see below), whose sum is σ = 144248256. Its totient is φ = 48082736.

The previous prime is 90155123. The next prime is 90155167. The reversal of 90155145 is 54155109.

It is an interprime number because it is at equal distance from previous prime (90155123) and next prime (90155167).

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

It is a cyclic number.

It is not a de Polignac number, because 90155145 - 2¹² = 90151049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005157 + ... + 3005186.

It is an arithmetic number, because the mean of its divisors is an integer number (18031032).

Almost surely, 2^90155145 is an apocalyptic number.

It is an amenable number.

90155145 is a deficient number, since it is larger than the sum of its proper divisors (54093111).

90155145 is a wasteful number, since it uses less digits than its factorization.

90155145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010351.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 90155145 is about 9495.0063191132. The cubic root of 90155145 is about 448.3978333272.

The spelling of 90155145 in words is "ninety million, one hundred fifty-five thousand, one hundred forty-five".