1253650681 has 8 divisors (see below), whose sum is σ = 1300381280. Its totient is φ = 1207719072.

The previous prime is 1253650649. The next prime is 1253650691. The reversal of 1253650681 is 1860563521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1253650681 - 2⁵ = 1253650649 is a prime.

It is a super-2 number, since 2×1253650681² = 3143280059943527522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253650681.

It is not an unprimeable number, because it can be changed into a prime (1253650691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196551 + ... + 202828.

It is an arithmetic number, because the mean of its divisors is an integer number (162547660).

Almost surely, 2^1253650681 is an apocalyptic number.

It is an amenable number.

1253650681 is a deficient number, since it is larger than the sum of its proper divisors (46730599).

1253650681 is an equidigital number, since it uses as much as digits as its factorization.

1253650681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399495.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1253650681 is about 35406.9298443116. The cubic root of 1253650681 is about 1078.2650129284.

The spelling of 1253650681 in words is "one billion, two hundred fifty-three million, six hundred fifty thousand, six hundred eighty-one".