12477457 has 4 divisors (see below), whose sum is σ = 12542976. Its totient is φ = 12411940.

The previous prime is 12477449. The next prime is 12477467. The reversal of 12477457 is 75477421.

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 an emirpimes, since its reverse is a distinct semiprime: 75477421 = 23 ⋅3281627.

It is a cyclic number.

It is not a de Polignac number, because 12477457 - 2³ = 12477449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12477467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32473 + ... + 32854.

It is an arithmetic number, because the mean of its divisors is an integer number (3135744).

Almost surely, 2^12477457 is an apocalyptic number.

It is an amenable number.

12477457 is a deficient number, since it is larger than the sum of its proper divisors (65519).

12477457 is an equidigital number, since it uses as much as digits as its factorization.

12477457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65518.

The product of its digits is 54880, while the sum is 37.

The square root of 12477457 is about 3532.3444056320. The cubic root of 12477457 is about 231.9398439455.

The spelling of 12477457 in words is "twelve million, four hundred seventy-seven thousand, four hundred fifty-seven".