421310540 has 24 divisors (see below), whose sum is σ = 1011145632. Its totient is φ = 144449280.

The previous prime is 421310537. The next prime is 421310611. The reversal of 421310540 is 45013124.

It is a super-2 number, since 2×421310540² = 355005142230183200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1504541 + ... + 1504820.

It is an arithmetic number, because the mean of its divisors is an integer number (42131068).

Almost surely, 2^421310540 is an apocalyptic number.

It is an amenable number.

421310540 is an abundant number, since it is smaller than the sum of its proper divisors (589835092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421310540 is a wasteful number, since it uses less digits than its factorization.

421310540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009377 (or 3009375 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 421310540 is about 20525.8505304896. The cubic root of 421310540 is about 749.6653558918.

Adding to 421310540 its reverse (45013124), we get a palindrome (466323664).

The spelling of 421310540 in words is "four hundred twenty-one million, three hundred ten thousand, five hundred forty".