1253065747 has 4 divisors (see below), whose sum is σ = 1253929600. Its totient is φ = 1252201896.

The previous prime is 1253065729. The next prime is 1253065757. The reversal of 1253065747 is 7475603521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7475603521 = 193 ⋅38733697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253065747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253065757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429747 + ... + 432652.

It is an arithmetic number, because the mean of its divisors is an integer number (313482400).

Almost surely, 2^1253065747 is an apocalyptic number.

1253065747 is a deficient number, since it is larger than the sum of its proper divisors (863853).

1253065747 is an equidigital number, since it uses as much as digits as its factorization.

1253065747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863852.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 1253065747 is about 35398.6687179052. The cubic root of 1253065747 is about 1078.0972862520.

The spelling of 1253065747 in words is "one billion, two hundred fifty-three million, sixty-five thousand, seven hundred forty-seven".