402110421 has 4 divisors (see below), whose sum is σ = 536147232. Its totient is φ = 268073612.

The previous prime is 402110389. The next prime is 402110437. The reversal of 402110421 is 124011204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402110421 - 2⁵ = 402110389 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402110421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402110461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67018401 + ... + 67018406.

It is an arithmetic number, because the mean of its divisors is an integer number (134036808).

Almost surely, 2^402110421 is an apocalyptic number.

It is an amenable number.

402110421 is a deficient number, since it is larger than the sum of its proper divisors (134036811).

402110421 is a wasteful number, since it uses less digits than its factorization.

402110421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134036810.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 402110421 is about 20052.6911161570. The cubic root of 402110421 is about 738.0998370380.

Adding to 402110421 its reverse (124011204), we get a palindrome (526121625).

The spelling of 402110421 in words is "four hundred two million, one hundred ten thousand, four hundred twenty-one".