402424421 has 8 divisors (see below), whose sum is σ = 465455424. Its totient is φ = 340778880.

The previous prime is 402424417. The next prime is 402424457. The reversal of 402424421 is 124424204.

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

It is a cyclic number.

It is not a de Polignac number, because 402424421 - 2² = 402424417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402424411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345740 + ... + 346901.

It is an arithmetic number, because the mean of its divisors is an integer number (58181928).

Almost surely, 2^402424421 is an apocalyptic number.

It is an amenable number.

402424421 is a deficient number, since it is larger than the sum of its proper divisors (63031003).

402424421 is an equidigital number, since it uses as much as digits as its factorization.

402424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692731.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 402424421 is about 20060.5189613828. The cubic root of 402424421 is about 738.2919095272.

Adding to 402424421 its reverse (124424204), we get a palindrome (526848625).

The spelling of 402424421 in words is "four hundred two million, four hundred twenty-four thousand, four hundred twenty-one".