421161253 has 2 divisors, whose sum is σ = 421161254. Its totient is φ = 421161252.

The previous prime is 421161241. The next prime is 421161271. The reversal of 421161253 is 352161124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371063169 + 50098084 = 19263^2 + 7078^2 .

It is a cyclic number.

It is not a de Polignac number, because 421161253 - 2⁹ = 421160741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421161203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210580626 + 210580627.

It is an arithmetic number, because the mean of its divisors is an integer number (210580627).

Almost surely, 2^421161253 is an apocalyptic number.

It is an amenable number.

421161253 is a deficient number, since it is larger than the sum of its proper divisors (1).

421161253 is an equidigital number, since it uses as much as digits as its factorization.

421161253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 421161253 is about 20522.2136476551. The cubic root of 421161253 is about 749.5768000621.

It can be divided in two parts, 42 and 1161253, that multiplied together give a triangular number (48772626 = T₉₈₇₆).

The spelling of 421161253 in words is "four hundred twenty-one million, one hundred sixty-one thousand, two hundred fifty-three".