149031251 has 4 divisors (see below), whose sum is σ = 149076072. Its totient is φ = 148986432.

The previous prime is 149031221. The next prime is 149031271. The reversal of 149031251 is 152130941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149031251 - 2¹⁴ = 149014867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149031251.

It is not an unprimeable number, because it can be changed into a prime (149031221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16985 + ... + 24218.

It is an arithmetic number, because the mean of its divisors is an integer number (37269018).

Almost surely, 2^149031251 is an apocalyptic number.

149031251 is a deficient number, since it is larger than the sum of its proper divisors (44821).

149031251 is an equidigital number, since it uses as much as digits as its factorization.

149031251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44820.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 149031251 is about 12207.8356394571. The cubic root of 149031251 is about 530.1829806072.

The spelling of 149031251 in words is "one hundred forty-nine million, thirty-one thousand, two hundred fifty-one".