1163401225 has 12 divisors (see below), whose sum is σ = 1648705984. Its totient is φ = 797760720.

The previous prime is 1163401181. The next prime is 1163401237. The reversal of 1163401225 is 5221043611.

It is a happy number.

It is not a de Polignac number, because 1163401225 - 2⁷ = 1163401097 is a prime.

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 1163401225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3323829 + ... + 3324178.

Almost surely, 2^1163401225 is an apocalyptic number.

It is an amenable number.

1163401225 is a deficient number, since it is larger than the sum of its proper divisors (485304759).

1163401225 is an equidigital number, since it uses as much as digits as its factorization.

1163401225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648024 (or 6648019 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1163401225 is about 34108.6678866238. The cubic root of 1163401225 is about 1051.7435054556.

Adding to 1163401225 its reverse (5221043611), we get a palindrome (6384444836).

The spelling of 1163401225 in words is "one billion, one hundred sixty-three million, four hundred one thousand, two hundred twenty-five".