1231057632 has 96 divisors (see below), whose sum is σ = 3740083200. Its totient is φ = 347263488.

The previous prime is 1231057631. The next prime is 1231057651. The reversal of 1231057632 is 2367501321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 1231057632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231057631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41494 + ... + 64682.

It is an arithmetic number, because the mean of its divisors is an integer number (38959200).

Almost surely, 2^1231057632 is an apocalyptic number.

1231057632 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 1231057632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1870041600).

1231057632 is an abundant number, since it is smaller than the sum of its proper divisors (2509025568).

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

1231057632 is a wasteful number, since it uses less digits than its factorization.

1231057632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23288 (or 23280 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 1231057632 is about 35086.4308814676. The cubic root of 1231057632 is about 1071.7482794283.

Adding to 1231057632 its reverse (2367501321), we get a palindrome (3598558953).

The spelling of 1231057632 in words is "one billion, two hundred thirty-one million, fifty-seven thousand, six hundred thirty-two".