12277661 has 16 divisors (see below), whose sum is σ = 13894848. Its totient is φ = 10752000.

The previous prime is 12277633. The next prime is 12277663. The reversal of 12277661 is 16677221.

It is a cyclic number.

It is not a de Polignac number, because 12277661 - 2⁶ = 12277597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12277663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47645 + ... + 47901.

It is an arithmetic number, because the mean of its divisors is an integer number (868428).

Almost surely, 2^12277661 is an apocalyptic number.

12277661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12277661 is a deficient number, since it is larger than the sum of its proper divisors (1617187).

12277661 is a wasteful number, since it uses less digits than its factorization.

12277661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its digits is 7056, while the sum is 32.

The square root of 12277661 is about 3503.9493432411. The cubic root of 12277661 is about 230.6951933917.

It can be divided in two parts, 1227 and 7661, that added together give a palindrome (8888).

The spelling of 12277661 in words is "twelve million, two hundred seventy-seven thousand, six hundred sixty-one".