12979554 has 16 divisors (see below), whose sum is σ = 29667648. Its totient is φ = 3708432.

The previous prime is 12979553. The next prime is 12979573. The reversal of 12979554 is 45597921.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 309037 = 12979554 / (1 + 2 + 9 + 7 + 9 + 5 + 5 + 4).

It is not an unprimeable number, because it can be changed into a prime (12979553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154477 + ... + 154560.

It is an arithmetic number, because the mean of its divisors is an integer number (1854228).

Almost surely, 2^12979554 is an apocalyptic number.

12979554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12979554 is an abundant number, since it is smaller than the sum of its proper divisors (16688094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12979554 is a wasteful number, since it uses less digits than its factorization.

12979554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309049.

The product of its digits is 113400, while the sum is 42.

The square root of 12979554 is about 3602.7148096956. The cubic root of 12979554 is about 235.0101338621.

The spelling of 12979554 in words is "twelve million, nine hundred seventy-nine thousand, five hundred fifty-four".