149493521 has 8 divisors (see below), whose sum is σ = 154927080. Its totient is φ = 144078592.

The previous prime is 149493497. The next prime is 149493569. The reversal of 149493521 is 125394941.

It can be written as a sum of positive squares in 4 ways, for example, as 5013121 + 144480400 = 2239^2 + 12020^2 .

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 149493521 - 2⁶ = 149493457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149493221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12851 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (19365885).

Almost surely, 2^149493521 is an apocalyptic number.

It is an amenable number.

149493521 is a deficient number, since it is larger than the sum of its proper divisors (5433559).

149493521 is an equidigital number, since it uses as much as digits as its factorization.

149493521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9315.

The product of its digits is 38880, while the sum is 38.

The square root of 149493521 is about 12226.7543117542. The cubic root of 149493521 is about 530.7305944210.

The spelling of 149493521 in words is "one hundred forty-nine million, four hundred ninety-three thousand, five hundred twenty-one".