1253445145 has 16 divisors (see below), whose sum is σ = 1570488192. Its totient is φ = 958573440.

The previous prime is 1253445131. The next prime is 1253445161. The reversal of 1253445145 is 5415443521.

It is not a de Polignac number, because 1253445145 - 2¹¹ = 1253443097 is a prime.

It is a super-2 number, since 2×1253445145² = 3142249463048142050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253445145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337750 + ... + 341440.

It is an arithmetic number, because the mean of its divisors is an integer number (98155512).

Almost surely, 2^1253445145 is an apocalyptic number.

It is an amenable number.

1253445145 is a deficient number, since it is larger than the sum of its proper divisors (317043047).

1253445145 is a wasteful number, since it uses less digits than its factorization.

1253445145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672.

The product of its digits is 48000, while the sum is 34.

The square root of 1253445145 is about 35404.0272426740. The cubic root of 1253445145 is about 1078.2060825331.

Adding to 1253445145 its reverse (5415443521), we get a palindrome (6668888666).

The spelling of 1253445145 in words is "one billion, two hundred fifty-three million, four hundred forty-five thousand, one hundred forty-five".