1153121450 has 48 divisors (see below), whose sum is σ = 2333730840. Its totient is φ = 421355520.

The previous prime is 1153121447. The next prime is 1153121479. The reversal of 1153121450 is 541213511.

It can be written as a sum of positive squares in 12 ways, for example, as 145757329 + 1007364121 = 12073^2 + 31739^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53906 + ... + 72194.

Almost surely, 2^1153121450 is an apocalyptic number.

1153121450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1153121450 is an abundant number, since it is smaller than the sum of its proper divisors (1180609390).

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

1153121450 is a wasteful number, since it uses less digits than its factorization.

1153121450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18411 (or 18406 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1153121450 is about 33957.6419970527. The cubic root of 1153121450 is about 1048.6366129214.

Adding to 1153121450 its reverse (541213511), we get a palindrome (1694334961).

The spelling of 1153121450 in words is "one billion, one hundred fifty-three million, one hundred twenty-one thousand, four hundred fifty".