402121065 has 8 divisors (see below), whose sum is σ = 643393728. Its totient is φ = 214464560.

The previous prime is 402121063. The next prime is 402121081. The reversal of 402121065 is 560121204.

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

It is not a de Polignac number, because 402121065 - 2¹ = 402121063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402121063) 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 7 ways as a sum of consecutive naturals, for example, 13404021 + ... + 13404050.

It is an arithmetic number, because the mean of its divisors is an integer number (80424216).

Almost surely, 2^402121065 is an apocalyptic number.

It is an amenable number.

402121065 is a deficient number, since it is larger than the sum of its proper divisors (241272663).

402121065 is a wasteful number, since it uses less digits than its factorization.

402121065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26808079.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 402121065 is about 20052.9565151875. The cubic root of 402121065 is about 738.1063495653.

Adding to 402121065 its reverse (560121204), we get a palindrome (962242269).

The spelling of 402121065 in words is "four hundred two million, one hundred twenty-one thousand, sixty-five".