1261200616 has 32 divisors (see below), whose sum is σ = 2553384960. Its totient is φ = 580554432.

The previous prime is 1261200613. The next prime is 1261200617. The reversal of 1261200616 is 6160021621.

It is not an unprimeable number, because it can be changed into a prime (1261200613) 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, 24001 + ... + 55663.

It is an arithmetic number, because the mean of its divisors is an integer number (79793280).

Almost surely, 2^1261200616 is an apocalyptic number.

It is an amenable number.

1261200616 is an abundant number, since it is smaller than the sum of its proper divisors (1292184344).

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

1261200616 is a wasteful number, since it uses less digits than its factorization.

1261200616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32065 (or 32061 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1261200616 is about 35513.3864338505. The cubic root of 1261200616 is about 1080.4252486320.

The spelling of 1261200616 in words is "one billion, two hundred sixty-one million, two hundred thousand, six hundred sixteen".