421213541 has 16 divisors (see below), whose sum is σ = 493973760. Its totient is φ = 351630720.

The previous prime is 421213537. The next prime is 421213553. The reversal of 421213541 is 145312124.

It is not a de Polignac number, because 421213541 - 2² = 421213537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421213501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262955 + ... + 264551.

It is an arithmetic number, because the mean of its divisors is an integer number (30873360).

Almost surely, 2^421213541 is an apocalyptic number.

421213541 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

421213541 is a deficient number, since it is larger than the sum of its proper divisors (72760219).

421213541 is a wasteful number, since it uses less digits than its factorization.

421213541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its digits is 960, while the sum is 23.

The square root of 421213541 is about 20523.4875447620. The cubic root of 421213541 is about 749.6078192577.

Adding to 421213541 its reverse (145312124), we get a palindrome (566525665).

The spelling of 421213541 in words is "four hundred twenty-one million, two hundred thirteen thousand, five hundred forty-one".