149427557 has 4 divisors (see below), whose sum is σ = 149541996. Its totient is φ = 149313120.

The previous prime is 149427547. The next prime is 149427563. The reversal of 149427557 is 755724941.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99880036 + 49547521 = 9994^2 + 7039^2 .

It is a cyclic number.

It is not a de Polignac number, because 149427557 - 2⁸ = 149427301 is a prime.

It is a super-3 number, since 3×149427557³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149427547) 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, 55238 + ... + 57879.

It is an arithmetic number, because the mean of its divisors is an integer number (37385499).

Almost surely, 2^149427557 is an apocalyptic number.

It is an amenable number.

149427557 is a deficient number, since it is larger than the sum of its proper divisors (114439).

149427557 is a wasteful number, since it uses less digits than its factorization.

149427557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114438.

The product of its digits is 352800, while the sum is 44.

The square root of 149427557 is about 12224.0564871077. The cubic root of 149427557 is about 530.6525213308.

The spelling of 149427557 in words is "one hundred forty-nine million, four hundred twenty-seven thousand, five hundred fifty-seven".