1261322032 has 40 divisors (see below), whose sum is σ = 2537806320. Its totient is φ = 606827520.

The previous prime is 1261322009. The next prime is 1261322039. The reversal of 1261322032 is 2302231621.

It is a junction number, because it is equal to n+sod(n) for n = 1261321994 and 1261322012.

It is not an unprimeable number, because it can be changed into a prime (1261322039) 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, 34719 + ... + 61057.

It is an arithmetic number, because the mean of its divisors is an integer number (63445158).

Almost surely, 2^1261322032 is an apocalyptic number.

It is an amenable number.

1261322032 is an abundant number, since it is smaller than the sum of its proper divisors (1276484288).

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

1261322032 is a wasteful number, since it uses less digits than its factorization.

1261322032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26461 (or 26455 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1261322032 is about 35515.0958326174. The cubic root of 1261322032 is about 1080.4599184276.

Adding to 1261322032 its reverse (2302231621), we get a palindrome (3563553653).

It can be divided in two parts, 126132 and 2032, that added together give a square (128164 = 358²).

The spelling of 1261322032 in words is "one billion, two hundred sixty-one million, three hundred twenty-two thousand, thirty-two".