1253247740 has 24 divisors (see below), whose sum is σ = 2632488432. Its totient is φ = 501171840.

The previous prime is 1253247719. The next prime is 1253247761. The reversal of 1253247740 is 477423521.

It is an interprime number because it is at equal distance from previous prime (1253247719) and next prime (1253247761).

It is a self number, because there is not a number n which added to its sum of digits gives 1253247740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139175 + ... + 147905.

It is an arithmetic number, because the mean of its divisors is an integer number (109687018).

Almost surely, 2^1253247740 is an apocalyptic number.

1253247740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253247740 is an abundant number, since it is smaller than the sum of its proper divisors (1379240692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253247740 is a wasteful number, since it uses less digits than its factorization.

1253247740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917 (or 15915 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 1253247740 is about 35401.2392438457. The cubic root of 1253247740 is about 1078.1494773579.

The spelling of 1253247740 in words is "one billion, two hundred fifty-three million, two hundred forty-seven thousand, seven hundred forty".