421402516 has 24 divisors (see below), whose sum is σ = 743904000. Its totient is φ = 208866624.

The previous prime is 421402489. The next prime is 421402519. The reversal of 421402516 is 615204124.

It is a happy number.

It is a super-2 number, since 2×421402516² = 355160160982260512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421402519) 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, 292125 + ... + 293563.

It is an arithmetic number, because the mean of its divisors is an integer number (30996000).

Almost surely, 2^421402516 is an apocalyptic number.

It is an amenable number.

421402516 is a deficient number, since it is larger than the sum of its proper divisors (322501484).

421402516 is a wasteful number, since it uses less digits than its factorization.

421402516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2029 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 421402516 is about 20528.0909000326. The cubic root of 421402516 is about 749.7199048901.

The spelling of 421402516 in words is "four hundred twenty-one million, four hundred two thousand, five hundred sixteen".