402044121 has 8 divisors (see below), whose sum is σ = 595620960. Its totient is φ = 268029396.

The previous prime is 402044119. The next prime is 402044131. The reversal of 402044121 is 121440204.

It is not a de Polignac number, because 402044121 - 2¹ = 402044119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402044094 and 402044103.

It is not an unprimeable number, because it can be changed into a prime (402044131) 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, 7445235 + ... + 7445288.

It is an arithmetic number, because the mean of its divisors is an integer number (74452620).

Almost surely, 2^402044121 is an apocalyptic number.

It is an amenable number.

402044121 is a deficient number, since it is larger than the sum of its proper divisors (193576839).

402044121 is a wasteful number, since it uses less digits than its factorization.

402044121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14890532 (or 14890526 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 402044121 is about 20051.0379033106. The cubic root of 402044121 is about 738.0592688205.

Adding to 402044121 its reverse (121440204), we get a palindrome (523484325).

The spelling of 402044121 in words is "four hundred two million, forty-four thousand, one hundred twenty-one".