1421253241 has 4 divisors (see below), whose sum is σ = 1421357812. Its totient is φ = 1421148672.

The previous prime is 1421253217. The next prime is 1421253269. The reversal of 1421253241 is 1423521241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1423521241 = 977 ⋅1457033.

It can be written as a sum of positive squares in 2 ways, for example, as 958831225 + 462422016 = 30965^2 + 21504^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421253241 - 2⁵ = 1421253209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421253271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28200 + ... + 60313.

It is an arithmetic number, because the mean of its divisors is an integer number (355339453).

Almost surely, 2^1421253241 is an apocalyptic number.

It is an amenable number.

1421253241 is a deficient number, since it is larger than the sum of its proper divisors (104571).

1421253241 is an equidigital number, since it uses as much as digits as its factorization.

1421253241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104570.

The product of its digits is 1920, while the sum is 25.

The square root of 1421253241 is about 37699.5124769539. The cubic root of 1421253241 is about 1124.3214320405.

Adding to 1421253241 its reverse (1423521241), we get a palindrome (2844774482).

The spelling of 1421253241 in words is "one billion, four hundred twenty-one million, two hundred fifty-three thousand, two hundred forty-one".