149090521 has 2 divisors, whose sum is σ = 149090522. Its totient is φ = 149090520.

The previous prime is 149090509. The next prime is 149090567. The reversal of 149090521 is 125090941.

149090521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129163225 + 19927296 = 11365^2 + 4464^2 .

It is an emirp because it is prime and its reverse (125090941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149090521 - 2⁹ = 149090009 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (149091521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74545260 + 74545261.

It is an arithmetic number, because the mean of its divisors is an integer number (74545261).

Almost surely, 2^149090521 is an apocalyptic number.

It is an amenable number.

149090521 is a deficient number, since it is larger than the sum of its proper divisors (1).

149090521 is an equidigital number, since it uses as much as digits as its factorization.

149090521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 149090521 is about 12210.2629373818. The cubic root of 149090521 is about 530.2532562041.

The spelling of 149090521 in words is "one hundred forty-nine million, ninety thousand, five hundred twenty-one".