1145901259 has 4 divisors (see below), whose sum is σ = 1146478216. Its totient is φ = 1145324304.

The previous prime is 1145901227. The next prime is 1145901271. The reversal of 1145901259 is 9521095411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9521095411 = 37 ⋅257326903.

It is a cyclic number.

It is not a de Polignac number, because 1145901259 - 2⁵ = 1145901227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145901859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285489 + ... + 289474.

It is an arithmetic number, because the mean of its divisors is an integer number (286619554).

Almost surely, 2^1145901259 is an apocalyptic number.

1145901259 is a deficient number, since it is larger than the sum of its proper divisors (576957).

1145901259 is an equidigital number, since it uses as much as digits as its factorization.

1145901259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576956.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 1145901259 is about 33851.1633330378. The cubic root of 1145901259 is about 1046.4433734768.

The spelling of 1145901259 in words is "one billion, one hundred forty-five million, nine hundred one thousand, two hundred fifty-nine".