12477561 has 4 divisors (see below), whose sum is σ = 16636752. Its totient is φ = 8318372.

The previous prime is 12477559. The next prime is 12477581. The reversal of 12477561 is 16577421.

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.

It is a cyclic number.

It is not a de Polignac number, because 12477561 - 2¹ = 12477559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12477551) 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, 2079591 + ... + 2079596.

It is an arithmetic number, because the mean of its divisors is an integer number (4159188).

Almost surely, 2^12477561 is an apocalyptic number.

It is an amenable number.

12477561 is a deficient number, since it is larger than the sum of its proper divisors (4159191).

12477561 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 8 representation: 12477561 = (57462171)₈.

12477561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159190.

The product of its digits is 11760, while the sum is 33.

The square root of 12477561 is about 3532.3591267027. The cubic root of 12477561 is about 231.9404883524.

The spelling of 12477561 in words is "twelve million, four hundred seventy-seven thousand, five hundred sixty-one".