149642251 has 8 divisors (see below), whose sum is σ = 167228208. Its totient is φ = 132720000.

The previous prime is 149642237. The next prime is 149642261. The reversal of 149642251 is 152246941.

149642251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 149642251 - 2¹³ = 149634059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149642201) 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, 165450 + ... + 166351.

It is an arithmetic number, because the mean of its divisors is an integer number (20903526).

Almost surely, 2^149642251 is an apocalyptic number.

149642251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

149642251 is a deficient number, since it is larger than the sum of its proper divisors (17585957).

149642251 is a wasteful number, since it uses less digits than its factorization.

149642251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331853.

The product of its digits is 17280, while the sum is 34.

The square root of 149642251 is about 12232.8349535175. The cubic root of 149642251 is about 530.9065427336.

The spelling of 149642251 in words is "one hundred forty-nine million, six hundred forty-two thousand, two hundred fifty-one".