149557 has 4 divisors (see below), whose sum is σ = 150336. Its totient is φ = 148780.

The previous prime is 149551. The next prime is 149561. The reversal of 149557 is 755941.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 149557 - 2¹⁵ = 116789 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 (149551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132 + ... + 562.

It is an arithmetic number, because the mean of its divisors is an integer number (37584).

2¹⁴⁹⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

149557 is a deficient number, since it is larger than the sum of its proper divisors (779).

149557 is an equidigital number, since it uses as much as digits as its factorization.

149557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778.

The product of its digits is 6300, while the sum is 31.

The square root of 149557 is about 386.7260011946. The cubic root of 149557 is about 53.0805704655.

The spelling of 149557 in words is "one hundred forty-nine thousand, five hundred fifty-seven".