2121479 has 2 divisors, whose sum is σ = 2121480. Its totient is φ = 2121478.

The previous prime is 2121461. The next prime is 2121503. The reversal of 2121479 is 9741212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060739 + 1060740.

It is an arithmetic number, because the mean of its divisors is an integer number (1060740).

2^2121479 is an apocalyptic number.

2121479 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121479 is an equidigital number, since it uses as much as digits as its factorization.

2121479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 2121479 is about 1456.5297799908. The cubic root of 2121479 is about 128.4930325725.

The spelling of 2121479 in words is "two million, one hundred twenty-one thousand, four hundred seventy-nine".