421252546 has 48 divisors (see below), whose sum is σ = 752166072. Its totient is φ = 175760640.

The previous prime is 421252543. The next prime is 421252549. The reversal of 421252546 is 645252124.

It is an interprime number because it is at equal distance from previous prime (421252543) and next prime (421252549).

It can be written as a sum of positive squares in 4 ways, for example, as 416364025 + 4888521 = 20405^2 + 2211^2 .

It is a super-2 number, since 2×421252546² = 354907415022964232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421252543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 921550 + ... + 922006.

Almost surely, 2^421252546 is an apocalyptic number.

421252546 is a deficient number, since it is larger than the sum of its proper divisors (330913526).

421252546 is a wasteful number, since it uses less digits than its factorization.

421252546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 776 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 421252546 is about 20524.4377754910. The cubic root of 421252546 is about 749.6309568097.

The spelling of 421252546 in words is "four hundred twenty-one million, two hundred fifty-two thousand, five hundred forty-six".