1251713133 has 24 divisors (see below), whose sum is σ = 2036027136. Its totient is φ = 734140800.

The previous prime is 1251713131. The next prime is 1251713161. The reversal of 1251713133 is 3313171521.

It is a happy number.

1251713133 is a `hidden beast` number, since 1 + 2 + 517 + 13 + 133 = 666.

It is not a de Polignac number, because 1251713133 - 2¹ = 1251713131 is a prime.

It is a super-3 number, since 3×1251713133³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1251713097 and 1251713106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251713131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200860 + ... + 206997.

It is an arithmetic number, because the mean of its divisors is an integer number (84834464).

Almost surely, 2^1251713133 is an apocalyptic number.

It is an amenable number.

1251713133 is a deficient number, since it is larger than the sum of its proper divisors (784314003).

1251713133 is a wasteful number, since it uses less digits than its factorization.

1251713133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407905 (or 407902 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 1251713133 is about 35379.5581233005. The cubic root of 1251713133 is about 1077.7092314617.

Adding to 1251713133 its reverse (3313171521), we get a palindrome (4564884654).

The spelling of 1251713133 in words is "one billion, two hundred fifty-one million, seven hundred thirteen thousand, one hundred thirty-three".