149271157 has 4 divisors (see below), whose sum is σ = 170595616. Its totient is φ = 127946700.

The previous prime is 149271151. The next prime is 149271191. The reversal of 149271157 is 751172941.

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 not a de Polignac number, because 149271157 - 2¹⁵ = 149238389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149271151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10662219 + ... + 10662232.

It is an arithmetic number, because the mean of its divisors is an integer number (42648904).

Almost surely, 2^149271157 is an apocalyptic number.

It is an amenable number.

149271157 is a deficient number, since it is larger than the sum of its proper divisors (21324459).

149271157 is an equidigital number, since it uses as much as digits as its factorization.

149271157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21324458.

The product of its digits is 17640, while the sum is 37.

The square root of 149271157 is about 12217.6575905531. The cubic root of 149271157 is about 530.4673189304.

The spelling of 149271157 in words is "one hundred forty-nine million, two hundred seventy-one thousand, one hundred fifty-seven".