402450842 has 8 divisors (see below), whose sum is σ = 605229300. Its totient is φ = 200707744.

The previous prime is 402450827. The next prime is 402450857. The reversal of 402450842 is 248054204.

It is an interprime number because it is at equal distance from previous prime (402450827) and next prime (402450857).

It can be written as a sum of positive squares in 2 ways, for example, as 304816681 + 97634161 = 17459^2 + 9881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257867 + ... + 259422.

Almost surely, 2^402450842 is an apocalyptic number.

402450842 is a deficient number, since it is larger than the sum of its proper divisors (202778458).

402450842 is a wasteful number, since it uses less digits than its factorization.

402450842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517680.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 402450842 is about 20061.1774828897. The cubic root of 402450842 is about 738.3080665848.

The spelling of 402450842 in words is "four hundred two million, four hundred fifty thousand, eight hundred forty-two".