421156730 has 16 divisors (see below), whose sum is σ = 759424680. Its totient is φ = 168164352.

The previous prime is 421156727. The next prime is 421156753. The reversal of 421156730 is 37651124.

It can be written as a sum of positive squares in 4 ways, for example, as 373532929 + 47623801 = 19327^2 + 6901^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421156693 and 421156702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31319 + ... + 42698.

Almost surely, 2^421156730 is an apocalyptic number.

421156730 is a deficient number, since it is larger than the sum of its proper divisors (338267950).

421156730 is a wasteful number, since it uses less digits than its factorization.

421156730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74593.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 421156730 is about 20522.1034496954. The cubic root of 421156730 is about 749.5741167289.

The spelling of 421156730 in words is "four hundred twenty-one million, one hundred fifty-six thousand, seven hundred thirty".