402499001 has 2 divisors, whose sum is σ = 402499002. Its totient is φ = 402499000.

The previous prime is 402498977. The next prime is 402499063. The reversal of 402499001 is 100994204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395214400 + 7284601 = 19880^2 + 2699^2 .

It is a cyclic number.

It is not a de Polignac number, because 402499001 - 2⁶ = 402498937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (402499301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201249500 + 201249501.

It is an arithmetic number, because the mean of its divisors is an integer number (201249501).

Almost surely, 2^402499001 is an apocalyptic number.

It is an amenable number.

402499001 is a deficient number, since it is larger than the sum of its proper divisors (1).

402499001 is an equidigital number, since it uses as much as digits as its factorization.

402499001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 402499001 is about 20062.3777504064. The cubic root of 402499001 is about 738.3375151172.

The spelling of 402499001 in words is "four hundred two million, four hundred ninety-nine thousand, one".