421202541 has 4 divisors (see below), whose sum is σ = 561603392. Its totient is φ = 280801692.

The previous prime is 421202533. The next prime is 421202569. The reversal of 421202541 is 145202124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421202541 - 2³ = 421202533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421202521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70200421 + ... + 70200426.

It is an arithmetic number, because the mean of its divisors is an integer number (140400848).

Almost surely, 2^421202541 is an apocalyptic number.

It is an amenable number.

421202541 is a deficient number, since it is larger than the sum of its proper divisors (140400851).

421202541 is a wasteful number, since it uses less digits than its factorization.

421202541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140400850.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 421202541 is about 20523.2195573696. The cubic root of 421202541 is about 749.6012938599.

Adding to 421202541 its reverse (145202124), we get a palindrome (566404665).

The spelling of 421202541 in words is "four hundred twenty-one million, two hundred two thousand, five hundred forty-one".