1261208604 has 12 divisors (see below), whose sum is σ = 2942820104. Its totient is φ = 420402864.

The previous prime is 1261208573. The next prime is 1261208609. The reversal of 1261208604 is 4068021621.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261208609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52550347 + ... + 52550370.

Almost surely, 2^1261208604 is an apocalyptic number.

It is an amenable number.

1261208604 is an abundant number, since it is smaller than the sum of its proper divisors (1681611500).

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

1261208604 is a wasteful number, since it uses less digits than its factorization.

1261208604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105100724 (or 105100722 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1261208604 is about 35513.4988983063. The cubic root of 1261208604 is about 1080.4275296381.

The spelling of 1261208604 in words is "one billion, two hundred sixty-one million, two hundred eight thousand, six hundred four".