421440075 has 36 divisors (see below), whose sum is σ = 862684368. Its totient is φ = 192657600.

The previous prime is 421440073. The next prime is 421440079. The reversal of 421440075 is 570044124.

It is not a de Polignac number, because 421440075 - 2¹ = 421440073 is a prime.

It is a super-2 number, since 2×421440075² = 355223473632011250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421440073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 132216 + ... + 135365.

Almost surely, 2^421440075 is an apocalyptic number.

421440075 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421440075 is an abundant number, since it is smaller than the sum of its proper divisors (441244293).

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

421440075 is a wasteful number, since it uses less digits than its factorization.

421440075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267604 (or 267596 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 421440075 is about 20529.0056992539. The cubic root of 421440075 is about 749.7421780473.

Adding to 421440075 its reverse (570044124), we get a palindrome (991484199).

The spelling of 421440075 in words is "four hundred twenty-one million, four hundred forty thousand, seventy-five".