1125213631 has 8 divisors (see below), whose sum is σ = 1130342400. Its totient is φ = 1120097400.

The previous prime is 1125213589. The next prime is 1125213641. The reversal of 1125213631 is 1363125211.

It is a happy number.

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 1125213631 - 2¹³ = 1125205439 is a prime.

It is a super-2 number, since 2×1125213631² = 2532211430776408322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1125213596 and 1125213605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125213641) 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, 207606 + ... + 212956.

It is an arithmetic number, because the mean of its divisors is an integer number (141292800).

Almost surely, 2^1125213631 is an apocalyptic number.

1125213631 is a deficient number, since it is larger than the sum of its proper divisors (5128769).

1125213631 is an equidigital number, since it uses as much as digits as its factorization.

1125213631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6269.

The product of its digits is 1080, while the sum is 25.

The square root of 1125213631 is about 33544.2041342465. The cubic root of 1125213631 is about 1040.1077400093.

Adding to 1125213631 its reverse (1363125211), we get a palindrome (2488338842).

The spelling of 1125213631 in words is "one billion, one hundred twenty-five million, two hundred thirteen thousand, six hundred thirty-one".