1201166525 has 24 divisors (see below), whose sum is σ = 1608792864. Its totient is φ = 884376000.

The previous prime is 1201166521. The next prime is 1201166537. The reversal of 1201166525 is 5256611021.

It is a happy number.

It is not a de Polignac number, because 1201166525 - 2² = 1201166521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201166521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107450 + ... + 118100.

It is an arithmetic number, because the mean of its divisors is an integer number (67033036).

Almost surely, 2^1201166525 is an apocalyptic number.

It is an amenable number.

1201166525 is a deficient number, since it is larger than the sum of its proper divisors (407626339).

1201166525 is a wasteful number, since it uses less digits than its factorization.

1201166525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021 (or 11016 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1201166525 is about 34657.8493995228. The cubic root of 1201166525 is about 1063.0027959396.

Adding to 1201166525 its reverse (5256611021), we get a palindrome (6457777546).

The spelling of 1201166525 in words is "one billion, two hundred one million, one hundred sixty-six thousand, five hundred twenty-five".