1031156412 has 96 divisors (see below), whose sum is σ = 2839898880. Its totient is φ = 287086080.

The previous prime is 1031156389. The next prime is 1031156417. The reversal of 1031156412 is 2146511301.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031156417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 398539 + ... + 401117.

It is an arithmetic number, because the mean of its divisors is an integer number (29582280).

Almost surely, 2^1031156412 is an apocalyptic number.

1031156412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031156412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419949440).

1031156412 is an abundant number, since it is smaller than the sum of its proper divisors (1808742468).

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

1031156412 is a wasteful number, since it uses less digits than its factorization.

1031156412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843 (or 2841 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1031156412 is about 32111.6242504175. The cubic root of 1031156412 is about 1010.2794416798.

Adding to 1031156412 its reverse (2146511301), we get a palindrome (3177667713).

The spelling of 1031156412 in words is "one billion, thirty-one million, one hundred fifty-six thousand, four hundred twelve".