421223541 has 16 divisors (see below), whose sum is σ = 598523904. Its totient is φ = 262889264.

The previous prime is 421223519. The next prime is 421223591. The reversal of 421223541 is 145322124.

It is not a de Polignac number, because 421223541 - 2⁹ = 421223029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421223591) 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, 61701 + ... + 68186.

It is an arithmetic number, because the mean of its divisors is an integer number (37407744).

Almost surely, 2^421223541 is an apocalyptic number.

It is an amenable number.

421223541 is a deficient number, since it is larger than the sum of its proper divisors (177300363).

421223541 is a wasteful number, since it uses less digits than its factorization.

421223541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129960.

The product of its digits is 1920, while the sum is 24.

The square root of 421223541 is about 20523.7311666276. The cubic root of 421223541 is about 749.6137513390.

Adding to 421223541 its reverse (145322124), we get a palindrome (566545665).

The spelling of 421223541 in words is "four hundred twenty-one million, two hundred twenty-three thousand, five hundred forty-one".