149566457 has 4 divisors (see below), whose sum is σ = 149592420. Its totient is φ = 149540496.

The previous prime is 149566429. The next prime is 149566463. The reversal of 149566457 is 754665941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754665941 = 409 ⋅1845149.

It can be written as a sum of positive squares in 2 ways, for example, as 54523456 + 95043001 = 7384^2 + 9749^2 .

It is a cyclic number.

It is not a de Polignac number, because 149566457 - 2⁸ = 149566201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149566057) 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, 38 + ... + 17295.

It is an arithmetic number, because the mean of its divisors is an integer number (37398105).

Almost surely, 2^149566457 is an apocalyptic number.

It is an amenable number.

149566457 is a deficient number, since it is larger than the sum of its proper divisors (25963).

149566457 is an equidigital number, since it uses as much as digits as its factorization.

149566457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25962.

The product of its digits is 907200, while the sum is 47.

The square root of 149566457 is about 12229.7365875149. The cubic root of 149566457 is about 530.8168926383.

The spelling of 149566457 in words is "one hundred forty-nine million, five hundred sixty-six thousand, four hundred fifty-seven".