12577861 has 4 divisors (see below), whose sum is σ = 12628224. Its totient is φ = 12527500.

The previous prime is 12577819. The next prime is 12577879. The reversal of 12577861 is 16877521.

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: 16877521 = 167 ⋅101063.

It is a cyclic number.

It is not a de Polignac number, because 12577861 - 2¹⁷ = 12446789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12577861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12577361) 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, 24805 + ... + 25306.

It is an arithmetic number, because the mean of its divisors is an integer number (3157056).

Almost surely, 2^12577861 is an apocalyptic number.

It is an amenable number.

12577861 is a deficient number, since it is larger than the sum of its proper divisors (50363).

12577861 is an equidigital number, since it uses as much as digits as its factorization.

12577861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50362.

The product of its digits is 23520, while the sum is 37.

The square root of 12577861 is about 3546.5280204730. The cubic root of 12577861 is about 232.5603096330.

The spelling of 12577861 in words is "twelve million, five hundred seventy-seven thousand, eight hundred sixty-one".