1153621225 has 9 divisors (see below), whose sum is σ = 1430700933. Its totient is φ = 922761120.

The previous prime is 1153621219. The next prime is 1153621289. The reversal of 1153621225 is 5221263511.

The square root of 1153621225 is 33965.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 367603929 + 786017296 = 19173^2 + 28036^2 .

It is not a de Polignac number, because 1153621225 - 2¹¹ = 1153619177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1153621193 and 1153621202.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 166429 + ... + 173221.

Almost surely, 2^1153621225 is an apocalyptic number.

1153621225 is the 33965-th square number.

1153621225 is the 16983-rd centered octagonal number.

It is an amenable number.

1153621225 is a deficient number, since it is larger than the sum of its proper divisors (277079708).

1153621225 is an frugal number, since it uses more digits than its factorization.

1153621225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596 (or 6798 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The cubic root of 1153621225 is about 1048.7880877631.

Multiplying 1153621225 by its product of digits (3600), we get a square (4153036410000 = 2037900²).

Adding to 1153621225 its reverse (5221263511), we get a palindrome (6374884736).

It can be divided in two parts, 11536 and 21225, that added together give a square (32761 = 181²).

The spelling of 1153621225 in words is "one billion, one hundred fifty-three million, six hundred twenty-one thousand, two hundred twenty-five".