421621152 has 24 divisors (see below), whose sum is σ = 1106755776. Its totient is φ = 140540352.

The previous prime is 421621147. The next prime is 421621171. The reversal of 421621152 is 251126124.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195848 + ... + 2196039.

It is an arithmetic number, because the mean of its divisors is an integer number (46114824).

Almost surely, 2^421621152 is an apocalyptic number.

It is an amenable number.

421621152 is an abundant number, since it is smaller than the sum of its proper divisors (685134624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421621152 is a wasteful number, since it uses less digits than its factorization.

421621152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391900 (or 4391892 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 421621152 is about 20533.4154976711. The cubic root of 421621152 is about 749.8495413738.

Adding to 421621152 its reverse (251126124), we get a palindrome (672747276).

The spelling of 421621152 in words is "four hundred twenty-one million, six hundred twenty-one thousand, one hundred fifty-two".