421552052 has 24 divisors (see below), whose sum is σ = 743064840. Its totient is φ = 209254400.

The previous prime is 421552051. The next prime is 421552097. The reversal of 421552052 is 250255124.

It can be written as a sum of positive squares in 4 ways, for example, as 190329616 + 231222436 = 13796^2 + 15206^2 .

It is a super-2 number, since 2×421552052² = 355412265090821408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421552051) 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, 430988 + ... + 431964.

It is an arithmetic number, because the mean of its divisors is an integer number (30961035).

Almost surely, 2^421552052 is an apocalyptic number.

It is an amenable number.

421552052 is a deficient number, since it is larger than the sum of its proper divisors (321512788).

421552052 is a wasteful number, since it uses less digits than its factorization.

421552052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 421552052 is about 20531.7328055866. The cubic root of 421552052 is about 749.8085745533.

The spelling of 421552052 in words is "four hundred twenty-one million, five hundred fifty-two thousand, fifty-two".