1231264133 has 8 divisors (see below), whose sum is σ = 1379500320. Its totient is φ = 1089078480.

The previous prime is 1231264121. The next prime is 1231264171. The reversal of 1231264133 is 3314621321.

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 1231264133 - 2⁸ = 1231263877 is a prime.

It is a super-2 number, since 2×1231264133² = 3032022730424483378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231269133) 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, 1512203 + ... + 1513016.

It is an arithmetic number, because the mean of its divisors is an integer number (172437540).

Almost surely, 2^1231264133 is an apocalyptic number.

It is an amenable number.

1231264133 is a deficient number, since it is larger than the sum of its proper divisors (148236187).

1231264133 is a wasteful number, since it uses less digits than its factorization.

1231264133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025267.

The product of its digits is 2592, while the sum is 26.

The square root of 1231264133 is about 35089.3735053791. The cubic root of 1231264133 is about 1071.8082020813.

Adding to 1231264133 its reverse (3314621321), we get a palindrome (4545885454).

The spelling of 1231264133 in words is "one billion, two hundred thirty-one million, two hundred sixty-four thousand, one hundred thirty-three".