149897251 has 16 divisors (see below), whose sum is σ = 182809600. Its totient is φ = 120045888.

The previous prime is 149897243. The next prime is 149897257. The reversal of 149897251 is 152798941.

It is a cyclic number.

It is not a de Polignac number, because 149897251 - 2³ = 149897243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149897257) 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, 1990 + ... + 17428.

It is an arithmetic number, because the mean of its divisors is an integer number (11425600).

Almost surely, 2^149897251 is an apocalyptic number.

149897251 is a deficient number, since it is larger than the sum of its proper divisors (32912349).

149897251 is a wasteful number, since it uses less digits than its factorization.

149897251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15538.

The product of its digits is 181440, while the sum is 46.

The square root of 149897251 is about 12243.2532849729. The cubic root of 149897251 is about 531.2079378739.

The spelling of 149897251 in words is "one hundred forty-nine million, eight hundred ninety-seven thousand, two hundred fifty-one".