421121253 has 8 divisors (see below), whose sum is σ = 641708608. Its totient is φ = 240640704.

The previous prime is 421121249. The next prime is 421121303. The reversal of 421121253 is 352121124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421121253 - 2² = 421121249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 20053393 = 421121253 / (4 + 2 + 1 + 1 + 2 + 1 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421121203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10026676 + ... + 10026717.

It is an arithmetic number, because the mean of its divisors is an integer number (80213576).

Almost surely, 2^421121253 is an apocalyptic number.

It is an amenable number.

421121253 is a deficient number, since it is larger than the sum of its proper divisors (220587355).

421121253 is a wasteful number, since it uses less digits than its factorization.

421121253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20053403.

The product of its digits is 480, while the sum is 21.

The square root of 421121253 is about 20521.2390707774. The cubic root of 421121253 is about 749.5530688341.

Adding to 421121253 its reverse (352121124), we get a palindrome (773242377).

It can be divided in two parts, 42112 and 1253, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 421121253 in words is "four hundred twenty-one million, one hundred twenty-one thousand, two hundred fifty-three".