402981451 has 2 divisors, whose sum is σ = 402981452. Its totient is φ = 402981450.

The previous prime is 402981421. The next prime is 402981457. The reversal of 402981451 is 154189204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402981451 - 2⁷ = 402981323 is a prime.

It is not a weakly prime, because it can be changed into another prime (402981457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201490725 + 201490726.

It is an arithmetic number, because the mean of its divisors is an integer number (201490726).

Almost surely, 2^402981451 is an apocalyptic number.

402981451 is a deficient number, since it is larger than the sum of its proper divisors (1).

402981451 is an equidigital number, since it uses as much as digits as its factorization.

402981451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 402981451 is about 20074.3978988163. The cubic root of 402981451 is about 738.6323967654.

The spelling of 402981451 in words is "four hundred two million, nine hundred eighty-one thousand, four hundred fifty-one".