149151857 has 4 divisors (see below), whose sum is σ = 149176896. Its totient is φ = 149126820.

The previous prime is 149151853. The next prime is 149151859. The reversal of 149151857 is 758151941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149151857 - 2² = 149151853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149151853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132 + ... + 17402.

It is an arithmetic number, because the mean of its divisors is an integer number (37294224).

Almost surely, 2^149151857 is an apocalyptic number.

It is an amenable number.

149151857 is a deficient number, since it is larger than the sum of its proper divisors (25039).

149151857 is an equidigital number, since it uses as much as digits as its factorization.

149151857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25038.

The product of its digits is 50400, while the sum is 41.

The square root of 149151857 is about 12212.7743367345. The cubic root of 149151857 is about 530.3259618205.

The spelling of 149151857 in words is "one hundred forty-nine million, one hundred fifty-one thousand, eight hundred fifty-seven".