1231572 has 24 divisors (see below), whose sum is σ = 2973600. Its totient is φ = 396256.

The previous prime is 1231553. The next prime is 1231577. The reversal of 1231572 is 2751321.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231577) 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, 1422 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (123900).

2^1231572 is an apocalyptic number.

1231572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231572 is an abundant number, since it is smaller than the sum of its proper divisors (1742028).

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

1231572 is a wasteful number, since it uses less digits than its factorization.

1231572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575 (or 3573 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 1231572 is about 1109.7621366761. The cubic root of 1231572 is about 107.1897526776.

Adding to 1231572 its reverse (2751321), we get a palindrome (3982893).

The spelling of 1231572 in words is "one million, two hundred thirty-one thousand, five hundred seventy-two".