1144555251 has 16 divisors (see below), whose sum is σ = 1749775104. Its totient is φ = 651897504.

The previous prime is 1144555241. The next prime is 1144555259. The reversal of 1144555251 is 1525554411.

It is a happy number.

It is not a de Polignac number, because 1144555251 - 2¹³ = 1144547059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144555259) 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, 82320 + ... + 95213.

It is an arithmetic number, because the mean of its divisors is an integer number (109360944).

Almost surely, 2^1144555251 is an apocalyptic number.

1144555251 is a deficient number, since it is larger than the sum of its proper divisors (605219853).

1144555251 is a wasteful number, since it uses less digits than its factorization.

1144555251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177850.

The product of its digits is 20000, while the sum is 33.

The square root of 1144555251 is about 33831.2762248190. The cubic root of 1144555251 is about 1046.0334856272.

The spelling of 1144555251 in words is "one billion, one hundred forty-four million, five hundred fifty-five thousand, two hundred fifty-one".