1213426453 has 4 divisors (see below), whose sum is σ = 1222981120. Its totient is φ = 1203871788.

The previous prime is 1213426411. The next prime is 1213426483. The reversal of 1213426453 is 3546243121.

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-1213426453 is a prime.

It is a super-2 number, since 2×1213426453² = 2944807513680322418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213426483) 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, 4777143 + ... + 4777396.

It is an arithmetic number, because the mean of its divisors is an integer number (305745280).

Almost surely, 2^1213426453 is an apocalyptic number.

It is an amenable number.

1213426453 is a deficient number, since it is larger than the sum of its proper divisors (9554667).

1213426453 is an equidigital number, since it uses as much as digits as its factorization.

1213426453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554666.

The product of its digits is 17280, while the sum is 31.

The square root of 1213426453 is about 34834.2712425565. The cubic root of 1213426453 is about 1066.6071389414.

Adding to 1213426453 its reverse (3546243121), we get a palindrome (4759669574).

The spelling of 1213426453 in words is "one billion, two hundred thirteen million, four hundred twenty-six thousand, four hundred fifty-three".