1243645132 has 24 divisors (see below), whose sum is σ = 2314763136. Its totient is φ = 582613248.

The previous prime is 1243645103. The next prime is 1243645153. The reversal of 1243645132 is 2315463421.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1243645094 and 1243645103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25843 + ... + 56170.

It is an arithmetic number, because the mean of its divisors is an integer number (96448464).

Almost surely, 2^1243645132 is an apocalyptic number.

It is an amenable number.

1243645132 is a deficient number, since it is larger than the sum of its proper divisors (1071118004).

1243645132 is a wasteful number, since it uses less digits than its factorization.

1243645132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82257 (or 82255 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 1243645132 is about 35265.3531387394. The cubic root of 1243645132 is about 1075.3887563129.

The spelling of 1243645132 in words is "one billion, two hundred forty-three million, six hundred forty-five thousand, one hundred thirty-two".