1166120125 has 16 divisors (see below), whose sum is σ = 1518596352. Its totient is φ = 892333200.

The previous prime is 1166120119. The next prime is 1166120173. The reversal of 1166120125 is 5210216611.

It is a happy number.

It is not a de Polignac number, because 1166120125 - 2¹⁵ = 1166087357 is a prime.

It is a super-2 number, since 2×1166120125² = 2719672291860031250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166120125.

It is a congruent number.

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, 199929 + ... + 205678.

It is an arithmetic number, because the mean of its divisors is an integer number (94912272).

Almost surely, 2^1166120125 is an apocalyptic number.

It is an amenable number.

1166120125 is a deficient number, since it is larger than the sum of its proper divisors (352476227).

1166120125 is an equidigital number, since it uses as much as digits as its factorization.

1166120125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405645 (or 405635 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1166120125 is about 34148.5010652005. The cubic root of 1166120125 is about 1052.5621856612.

Adding to 1166120125 its reverse (5210216611), we get a palindrome (6376336736).

The spelling of 1166120125 in words is "one billion, one hundred sixty-six million, one hundred twenty thousand, one hundred twenty-five".