1253748747 has 6 divisors (see below), whose sum is σ = 1671746772. Its totient is φ = 835791612.

The previous prime is 1253748739. The next prime is 1253748751. The reversal of 1253748747 is 7478473521.

It is not a de Polignac number, because 1253748747 - 2³ = 1253748739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253748696 and 1253748705.

It is not an unprimeable number, because it can be changed into a prime (1253748767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51108 + ... + 71550.

It is an arithmetic number, because the mean of its divisors is an integer number (278624462).

Almost surely, 2^1253748747 is an apocalyptic number.

1253748747 is a deficient number, since it is larger than the sum of its proper divisors (417998025).

1253748747 is an frugal number, since it uses more digits than its factorization.

1253748747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40889 (or 20446 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 48.

The square root of 1253748747 is about 35408.3146591306. The cubic root of 1253748747 is about 1078.2931277191.

Multiplying 1253748747 by its sum of digits (48), we get a square (60179939856 = 245316²).

The spelling of 1253748747 in words is "one billion, two hundred fifty-three million, seven hundred forty-eight thousand, seven hundred forty-seven".