1145345253 has 16 divisors (see below), whose sum is σ = 1667131200. Its totient is φ = 695170944.

The previous prime is 1145345231. The next prime is 1145345261. The reversal of 1145345253 is 3525435411.

It is not a de Polignac number, because 1145345253 - 2¹⁷ = 1145214181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145345203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198303 + ... + 203996.

It is an arithmetic number, because the mean of its divisors is an integer number (104195700).

Almost surely, 2^1145345253 is an apocalyptic number.

1145345253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1145345253 is a deficient number, since it is larger than the sum of its proper divisors (521785947).

1145345253 is a wasteful number, since it uses less digits than its factorization.

1145345253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402388.

The product of its digits is 36000, while the sum is 33.

The square root of 1145345253 is about 33842.9498271058. The cubic root of 1145345253 is about 1046.2740968430.

The spelling of 1145345253 in words is "one billion, one hundred forty-five million, three hundred forty-five thousand, two hundred fifty-three".