421072451 has 2 divisors, whose sum is σ = 421072452. Its totient is φ = 421072450.

The previous prime is 421072429. The next prime is 421072459. The reversal of 421072451 is 154270124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421072451 - 2¹⁴ = 421056067 is a prime.

It is a super-2 number, since 2×421072451² = 354604017982294802, which contains 22 as substring.

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 421072451.

It is not a weakly prime, because it can be changed into another prime (421072459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210536225 + 210536226.

It is an arithmetic number, because the mean of its divisors is an integer number (210536226).

Almost surely, 2^421072451 is an apocalyptic number.

421072451 is a deficient number, since it is larger than the sum of its proper divisors (1).

421072451 is an equidigital number, since it uses as much as digits as its factorization.

421072451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 421072451 is about 20520.0499755727. The cubic root of 421072451 is about 749.5241135140.

The spelling of 421072451 in words is "four hundred twenty-one million, seventy-two thousand, four hundred fifty-one".