421307956 has 6 divisors (see below), whose sum is σ = 737288930. Its totient is φ = 210653976.

The previous prime is 421307947. The next prime is 421307963. The reversal of 421307956 is 659703124.

It can be written as a sum of positive squares in only one way, i.e., 226984356 + 194323600 = 15066^2 + 13940^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52663491 + ... + 52663498.

Almost surely, 2^421307956 is an apocalyptic number.

It is an amenable number.

421307956 is a deficient number, since it is larger than the sum of its proper divisors (315980974).

421307956 is a wasteful number, since it uses less digits than its factorization.

421307956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105326993 (or 105326991 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 421307956 is about 20525.7875853766. The cubic root of 421307956 is about 749.6638232620.

It can be divided in two parts, 42130 and 7956, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 421307956 in words is "four hundred twenty-one million, three hundred seven thousand, nine hundred fifty-six".