421153541 has 4 divisors (see below), whose sum is σ = 421198752. Its totient is φ = 421108332.

The previous prime is 421153489. The next prime is 421153547. The reversal of 421153541 is 145351124.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421153541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421153541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421153547) 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, 2915 + ... + 29168.

It is an arithmetic number, because the mean of its divisors is an integer number (105299688).

Almost surely, 2^421153541 is an apocalyptic number.

It is an amenable number.

421153541 is a deficient number, since it is larger than the sum of its proper divisors (45211).

421153541 is a wasteful number, since it uses less digits than its factorization.

421153541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45210.

The product of its digits is 2400, while the sum is 26.

The square root of 421153541 is about 20522.0257528344. The cubic root of 421153541 is about 749.5722247983.

The spelling of 421153541 in words is "four hundred twenty-one million, one hundred fifty-three thousand, five hundred forty-one".