21462079 has 2 divisors, whose sum is σ = 21462080. Its totient is φ = 21462078.

The previous prime is 21462061. The next prime is 21462107. The reversal of 21462079 is 97026412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21462079 - 2¹⁵ = 21429311 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21462079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21462019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10731039 + 10731040.

It is an arithmetic number, because the mean of its divisors is an integer number (10731040).

Almost surely, 2^21462079 is an apocalyptic number.

21462079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21462079 is an equidigital number, since it uses as much as digits as its factorization.

21462079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 21462079 is about 4632.7183164963. The cubic root of 21462079 is about 277.9013115189.

It can be divided in two parts, 2146 and 2079, that added together give a square (4225 = 65²).

The spelling of 21462079 in words is "twenty-one million, four hundred sixty-two thousand, seventy-nine".