1145421250 has 20 divisors (see below), whose sum is σ = 2146979934. Its totient is φ = 458168000.

The previous prime is 1145421239. The next prime is 1145421293. The reversal of 1145421250 is 521245411.

It can be written as a sum of positive squares in 5 ways, for example, as 217061289 + 928359961 = 14733^2 + 30469^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 456919 + ... + 459418.

Almost surely, 2^1145421250 is an apocalyptic number.

1145421250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1145421250 is a deficient number, since it is larger than the sum of its proper divisors (1001558684).

1145421250 is an frugal number, since it uses more digits than its factorization.

1145421250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916359 (or 916344 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1145421250 is about 33844.0725977238. The cubic root of 1145421250 is about 1046.2972374444.

Adding to 1145421250 its reverse (521245411), we get a palindrome (1666666661).

The spelling of 1145421250 in words is "one billion, one hundred forty-five million, four hundred twenty-one thousand, two hundred fifty".