406736251 has 2 divisors, whose sum is σ = 406736252. Its totient is φ = 406736250.

The previous prime is 406736221. The next prime is 406736303. The reversal of 406736251 is 152637604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406736251 - 2⁷ = 406736123 is a prime.

It is not a weakly prime, because it can be changed into another prime (406736221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203368125 + 203368126.

It is an arithmetic number, because the mean of its divisors is an integer number (203368126).

Almost surely, 2^406736251 is an apocalyptic number.

406736251 is a deficient number, since it is larger than the sum of its proper divisors (1).

406736251 is an equidigital number, since it uses as much as digits as its factorization.

406736251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 406736251 is about 20167.7031662012. The cubic root of 406736251 is about 740.9193898869.

The spelling of 406736251 in words is "four hundred six million, seven hundred thirty-six thousand, two hundred fifty-one".