1201566604 has 36 divisors (see below), whose sum is σ = 2449491184. Its totient is φ = 505207872.

The previous prime is 1201566581. The next prime is 1201566607. The reversal of 1201566604 is 4066651021.

It is not an unprimeable number, because it can be changed into a prime (1201566607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71014 + ... + 86290.

Almost surely, 2^1201566604 is an apocalyptic number.

1201566604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201566604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224745592).

1201566604 is an abundant number, since it is smaller than the sum of its proper divisors (1247924580).

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

1201566604 is a wasteful number, since it uses less digits than its factorization.

1201566604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15394 (or 15339 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1201566604 is about 34663.6207572146. The cubic root of 1201566604 is about 1063.1208028598.

The spelling of 1201566604 in words is "one billion, two hundred one million, five hundred sixty-six thousand, six hundred four".