1253489473 has 4 divisors (see below), whose sum is σ = 1255575748. Its totient is φ = 1251403200.

The previous prime is 1253489459. The next prime is 1253489491. The reversal of 1253489473 is 3749843521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3749843521 = 29 ⋅129304949.

It can be written as a sum of positive squares in 2 ways, for example, as 609497344 + 643992129 = 24688^2 + 25377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253489473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253481473) 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, 1042236 + ... + 1043437.

It is an arithmetic number, because the mean of its divisors is an integer number (313893937).

Almost surely, 2^1253489473 is an apocalyptic number.

It is an amenable number.

1253489473 is a deficient number, since it is larger than the sum of its proper divisors (2086275).

1253489473 is an equidigital number, since it uses as much as digits as its factorization.

1253489473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086274.

The product of its digits is 725760, while the sum is 46.

The square root of 1253489473 is about 35404.6532676144. The cubic root of 1253489473 is about 1078.2187926109.

The spelling of 1253489473 in words is "one billion, two hundred fifty-three million, four hundred eighty-nine thousand, four hundred seventy-three".