421232641 has 4 divisors (see below), whose sum is σ = 443402800. Its totient is φ = 399062484.

The previous prime is 421232629. The next prime is 421232657. The reversal of 421232641 is 146232124.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421232641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421232041) 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, 11085051 + ... + 11085088.

It is an arithmetic number, because the mean of its divisors is an integer number (110850700).

It is a Proth number, since it is equal to 12855 ⋅ 2¹⁵ + 1 and 12855 < 2¹⁵.

Almost surely, 2^421232641 is an apocalyptic number.

It is an amenable number.

421232641 is a deficient number, since it is larger than the sum of its proper divisors (22170159).

421232641 is a wasteful number, since it uses less digits than its factorization.

421232641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22170158.

The product of its digits is 2304, while the sum is 25.

The square root of 421232641 is about 20523.9528600121. The cubic root of 421232641 is about 749.6191494514.

Adding to 421232641 its reverse (146232124), we get a palindrome (567464765).

The spelling of 421232641 in words is "four hundred twenty-one million, two hundred thirty-two thousand, six hundred forty-one".