1261588946 has 16 divisors (see below), whose sum is σ = 1964338560. Its totient is φ = 607249680.

The previous prime is 1261588931. The next prime is 1261588949. The reversal of 1261588946 is 6498851621.

It is a junction number, because it is equal to n+sod(n) for n = 1261588894 and 1261588903.

It is not an unprimeable number, because it can be changed into a prime (1261588949) 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, 104276 + ... + 115743.

It is an arithmetic number, because the mean of its divisors is an integer number (122771160).

Almost surely, 2^1261588946 is an apocalyptic number.

1261588946 is a deficient number, since it is larger than the sum of its proper divisors (702749614).

1261588946 is a wasteful number, since it uses less digits than its factorization.

1261588946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220129.

The product of its digits is 829440, while the sum is 50.

The square root of 1261588946 is about 35518.8533880248. The cubic root of 1261588946 is about 1080.5361267052.

The spelling of 1261588946 in words is "one billion, two hundred sixty-one million, five hundred eighty-eight thousand, nine hundred forty-six".