1212979 has 4 divisors (see below), whose sum is σ = 1276840. Its totient is φ = 1149120.

The previous prime is 1212973. The next prime is 1212989. The reversal of 1212979 is 9792121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1212979 - 2⁷ = 1212851 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 1212979.

It is not an unprimeable number, because it can be changed into a prime (1212973) 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, 31902 + ... + 31939.

It is an arithmetic number, because the mean of its divisors is an integer number (319210).

2^1212979 is an apocalyptic number.

1212979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1212979 is a deficient number, since it is larger than the sum of its proper divisors (63861).

1212979 is an equidigital number, since it uses as much as digits as its factorization.

1212979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63860.

The product of its digits is 2268, while the sum is 31.

The square root of 1212979 is about 1101.3532584961. The cubic root of 1212979 is about 106.6476018444.

The spelling of 1212979 in words is "one million, two hundred twelve thousand, nine hundred seventy-nine".