402342621 has 24 divisors (see below), whose sum is σ = 572699904. Its totient is φ = 251197440.

The previous prime is 402342601. The next prime is 402342631. The reversal of 402342621 is 126243204.

It is not a de Polignac number, because 402342621 - 2¹¹ = 402340573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402342591 and 402342600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402342601) 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 23 ways as a sum of consecutive naturals, for example, 192301 + ... + 194381.

It is an arithmetic number, because the mean of its divisors is an integer number (23862496).

Almost surely, 2^402342621 is an apocalyptic number.

It is an amenable number.

402342621 is a deficient number, since it is larger than the sum of its proper divisors (170357283).

402342621 is a wasteful number, since it uses less digits than its factorization.

402342621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 402342621 is about 20058.4800271606. The cubic root of 402342621 is about 738.2418824352.

Adding to 402342621 its reverse (126243204), we get a palindrome (528585825).

The spelling of 402342621 in words is "four hundred two million, three hundred forty-two thousand, six hundred twenty-one".