1145253550 has 48 divisors (see below), whose sum is σ = 2439843840. Its totient is φ = 391793760.

The previous prime is 1145253509. The next prime is 1145253581. The reversal of 1145253550 is 553525411.

It is a congruent number.

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, 167091 + ... + 173809.

It is an arithmetic number, because the mean of its divisors is an integer number (50830080).

Almost surely, 2^1145253550 is an apocalyptic number.

1145253550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1145253550 is an abundant number, since it is smaller than the sum of its proper divisors (1294590290).

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

1145253550 is a wasteful number, since it uses less digits than its factorization.

1145253550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7225 (or 7220 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1145253550 is about 33841.5949683226. The cubic root of 1145253550 is about 1046.2461725020.

Adding to 1145253550 its reverse (553525411), we get a palindrome (1698778961).

The spelling of 1145253550 in words is "one billion, one hundred forty-five million, two hundred fifty-three thousand, five hundred fifty".