1231512 has 48 divisors (see below), whose sum is σ = 3251640. Its totient is φ = 388608.

The previous prime is 1231511. The next prime is 1231513. The reversal of 1231512 is 2151321.

It is an interprime number because it is at equal distance from previous prime (1231511) and next prime (1231513).

It is a super-2 number, since 2×1231512² = 3033243612288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231491 and 1231500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12648 + ... + 12744.

2^1231512 is an apocalyptic number.

1231512 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 1231512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625820).

1231512 is an abundant number, since it is smaller than the sum of its proper divisors (2020128).

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

1231512 is a wasteful number, since it uses less digits than its factorization.

1231512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 125 counting only the distinct ones).

The product of its digits is 60, while the sum is 15.

The square root of 1231512 is about 1109.7351035270. The cubic root of 1231512 is about 107.1880119512.

Adding to 1231512 its reverse (2151321), we get a palindrome (3382833).

The spelling of 1231512 in words is "one million, two hundred thirty-one thousand, five hundred twelve".