421540379 has 8 divisors (see below), whose sum is σ = 454158432. Its totient is φ = 388949760.

The previous prime is 421540363. The next prime is 421540411. The reversal of 421540379 is 973045124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421540379 - 2⁴ = 421540363 is a prime.

It is a super-2 number, since 2×421540379² = 355392582254927282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421540319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34202 + ... + 44864.

It is an arithmetic number, because the mean of its divisors is an integer number (56769804).

Almost surely, 2^421540379 is an apocalyptic number.

421540379 is a deficient number, since it is larger than the sum of its proper divisors (32618053).

421540379 is a wasteful number, since it uses less digits than its factorization.

421540379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13717.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 421540379 is about 20531.4485363308. The cubic root of 421540379 is about 749.8016536237.

The spelling of 421540379 in words is "four hundred twenty-one million, five hundred forty thousand, three hundred seventy-nine".