1145421249 has 16 divisors (see below), whose sum is σ = 1745879040. Its totient is φ = 654348240.

The previous prime is 1145421239. The next prime is 1145421293. The reversal of 1145421249 is 9421245411.

It is not a de Polignac number, because 1145421249 - 2⁹ = 1145420737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1145421209) 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, 135744 + ... + 143934.

It is an arithmetic number, because the mean of its divisors is an integer number (109117440).

Almost surely, 2^1145421249 is an apocalyptic number.

It is an amenable number.

1145421249 is a deficient number, since it is larger than the sum of its proper divisors (600457791).

1145421249 is an equidigital number, since it uses as much as digits as its factorization.

1145421249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14860.

The product of its digits is 11520, while the sum is 33.

The square root of 1145421249 is about 33844.0725829502. The cubic root of 1145421249 is about 1046.2972371399.

The spelling of 1145421249 in words is "one billion, one hundred forty-five million, four hundred twenty-one thousand, two hundred forty-nine".