1253689794 has 36 divisors (see below), whose sum is σ = 3159812214. Its totient is φ = 358196832.

The previous prime is 1253689739. The next prime is 1253689883. The reversal of 1253689794 is 4979863521.

1253689794 is a `hidden beast` number, since 12 + 536 + 8 + 9 + 7 + 94 = 666.

It can be written as a sum of positive squares in only one way, i.e., 858197025 + 395492769 = 29295^2 + 19887^2 .

It is a super-3 number, since 3×1253689794³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1253689794.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 709827 + ... + 711590.

Almost surely, 2^1253689794 is an apocalyptic number.

1253689794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1253689794 is an abundant number, since it is smaller than the sum of its proper divisors (1906122420).

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

1253689794 is a wasteful number, since it uses less digits than its factorization.

1253689794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421439 (or 1421429 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 1253689794 is about 35407.4821753821. The cubic root of 1253689794 is about 1078.2762265095.

The spelling of 1253689794 in words is "one billion, two hundred fifty-three million, six hundred eighty-nine thousand, seven hundred ninety-four".