402680421 has 48 divisors (see below), whose sum is σ = 705449472. Its totient is φ = 217987200.

The previous prime is 402680419. The next prime is 402680437. The reversal of 402680421 is 124086204.

It is not a de Polignac number, because 402680421 - 2¹ = 402680419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402680461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34851 + ... + 44943.

It is an arithmetic number, because the mean of its divisors is an integer number (14696864).

Almost surely, 2^402680421 is an apocalyptic number.

It is an amenable number.

402680421 is a deficient number, since it is larger than the sum of its proper divisors (302769051).

402680421 is a wasteful number, since it uses less digits than its factorization.

402680421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154 (or 10151 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 402680421 is about 20066.8986393015. The cubic root of 402680421 is about 738.4484297378.

The spelling of 402680421 in words is "four hundred two million, six hundred eighty thousand, four hundred twenty-one".