402421546 has 8 divisors (see below), whose sum is σ = 619946820. Its totient is φ = 195772608.

The previous prime is 402421517. The next prime is 402421549. The reversal of 402421546 is 645124204.

It can be written as a sum of positive squares in 2 ways, for example, as 398441521 + 3980025 = 19961^2 + 1995^2 .

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

It is not an unprimeable number, because it can be changed into a prime (402421549) by changing a digit.

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, 2718991 + ... + 2719138.

Almost surely, 2^402421546 is an apocalyptic number.

402421546 is a deficient number, since it is larger than the sum of its proper divisors (217525274).

402421546 is a wasteful number, since it uses less digits than its factorization.

402421546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5438168.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 402421546 is about 20060.4473030887. The cubic root of 402421546 is about 738.2901513550.

The spelling of 402421546 in words is "four hundred two million, four hundred twenty-one thousand, five hundred forty-six".