1231880705 has 16 divisors (see below), whose sum is σ = 1668254400. Its totient is φ = 865018560.

The previous prime is 1231880653. The next prime is 1231880717. The reversal of 1231880705 is 5070881321.

It is not a de Polignac number, because 1231880705 - 2¹⁰ = 1231879681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384575 + ... + 387764.

It is an arithmetic number, because the mean of its divisors is an integer number (104265900).

Almost surely, 2^1231880705 is an apocalyptic number.

It is an amenable number.

1231880705 is a deficient number, since it is larger than the sum of its proper divisors (436373695).

1231880705 is a wasteful number, since it uses less digits than its factorization.

1231880705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772384.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 1231880705 is about 35098.1581425579. The cubic root of 1231880705 is about 1071.9870796621.

The spelling of 1231880705 in words is "one billion, two hundred thirty-one million, eight hundred eighty thousand, seven hundred five".