12977145 has 32 divisors (see below), whose sum is σ = 23331840. Its totient is φ = 6842880.

The previous prime is 12977143. The next prime is 12977147. The reversal of 12977145 is 54177921.

12977145 = 156² + 157² + ... + 349².

It is a happy number.

12977145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12977143) and next prime (12977147).

It is not a de Polignac number, because 12977145 - 2¹ = 12977143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12977141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12600 + ... + 13590.

It is an arithmetic number, because the mean of its divisors is an integer number (729120).

Almost surely, 2^12977145 is an apocalyptic number.

12977145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12977145 is a deficient number, since it is larger than the sum of its proper divisors (10354695).

12977145 is an equidigital number, since it uses as much as digits as its factorization.

12977145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102 (or 1096 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 12977145 is about 3602.3804629717. The cubic root of 12977145 is about 234.9955937004.

The spelling of 12977145 in words is "twelve million, nine hundred seventy-seven thousand, one hundred forty-five".