1453256643 has 4 divisors (see below), whose sum is σ = 1937675528. Its totient is φ = 968837760.

The previous prime is 1453256641. The next prime is 1453256647. The reversal of 1453256643 is 3466523541.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1453256643 - 2¹ = 1453256641 is a prime.

It is a super-2 number, since 2×1453256643² = 4223909740847258898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1453256641) 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, 242209438 + ... + 242209443.

It is an arithmetic number, because the mean of its divisors is an integer number (484418882).

Almost surely, 2^1453256643 is an apocalyptic number.

1453256643 is a deficient number, since it is larger than the sum of its proper divisors (484418885).

1453256643 is an equidigital number, since it uses as much as digits as its factorization.

1453256643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484418884.

The product of its digits is 259200, while the sum is 39.

The square root of 1453256643 is about 38121.6033634473. The cubic root of 1453256643 is about 1132.6979268018.

The spelling of 1453256643 in words is "one billion, four hundred fifty-three million, two hundred fifty-six thousand, six hundred forty-three".