1253297747 has 6 divisors (see below), whose sum is σ = 1357121412. Its totient is φ = 1156890072.

The previous prime is 1253297743. The next prime is 1253297753. The reversal of 1253297747 is 7477923521.

It is not a de Polignac number, because 1253297747 - 2² = 1253297743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253297743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3707813 + ... + 3708150.

It is an arithmetic number, because the mean of its divisors is an integer number (226186902).

Almost surely, 2^1253297747 is an apocalyptic number.

1253297747 is a deficient number, since it is larger than the sum of its proper divisors (103823665).

1253297747 is an equidigital number, since it uses as much as digits as its factorization.

1253297747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7415989 (or 7415976 counting only the distinct ones).

The product of its digits is 740880, while the sum is 47.

The square root of 1253297747 is about 35401.9455256346. The cubic root of 1253297747 is about 1078.1638172478.

The spelling of 1253297747 in words is "one billion, two hundred fifty-three million, two hundred ninety-seven thousand, seven hundred forty-seven".