1251542453 has 4 divisors (see below), whose sum is σ = 1430334240. Its totient is φ = 1072750668.

The previous prime is 1251542443. The next prime is 1251542459. The reversal of 1251542453 is 3542451521.

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 not a de Polignac number, because 1251542453 - 2¹⁴ = 1251526069 is a prime.

It is a super-2 number, since 2×1251542453² = 3132717023322514418, 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 (1251542459) 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, 89395883 + ... + 89395896.

It is an arithmetic number, because the mean of its divisors is an integer number (357583560).

Almost surely, 2^1251542453 is an apocalyptic number.

It is an amenable number.

1251542453 is a deficient number, since it is larger than the sum of its proper divisors (178791787).

1251542453 is an equidigital number, since it uses as much as digits as its factorization.

1251542453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178791786.

The product of its digits is 24000, while the sum is 32.

The square root of 1251542453 is about 35377.1459137110. The cubic root of 1251542453 is about 1077.6602447921.

Adding to 1251542453 its reverse (3542451521), we get a palindrome (4793993974).

The spelling of 1251542453 in words is "one billion, two hundred fifty-one million, five hundred forty-two thousand, four hundred fifty-three".