1243131632 has 20 divisors (see below), whose sum is σ = 2491622520. Its totient is φ = 600132288.

The previous prime is 1243131629. The next prime is 1243131641. The reversal of 1243131632 is 2361313421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339118 + ... + 1340045.

It is an arithmetic number, because the mean of its divisors is an integer number (124581126).

Almost surely, 2^1243131632 is an apocalyptic number.

It is an amenable number.

1243131632 is an abundant number, since it is smaller than the sum of its proper divisors (1248490888).

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

1243131632 is a wasteful number, since it uses less digits than its factorization.

1243131632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679200 (or 2679194 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 1243131632 is about 35258.0718701406. The cubic root of 1243131632 is about 1075.2407269080.

The spelling of 1243131632 in words is "one billion, two hundred forty-three million, one hundred thirty-one thousand, six hundred thirty-two".