1229572239 has 24 divisors (see below), whose sum is σ = 1911282048. Its totient is φ = 701069040.

The previous prime is 1229572231. The next prime is 1229572273. The reversal of 1229572239 is 9322759221.

It is a happy number.

It is not a de Polignac number, because 1229572239 - 2³ = 1229572231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1229572239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229572231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59694 + ... + 77604.

It is an arithmetic number, because the mean of its divisors is an integer number (79636752).

Almost surely, 2^1229572239 is an apocalyptic number.

1229572239 is a deficient number, since it is larger than the sum of its proper divisors (681709809).

1229572239 is a wasteful number, since it uses less digits than its factorization.

1229572239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18395 (or 18388 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 1229572239 is about 35065.2568648798. The cubic root of 1229572239 is about 1071.3170491136.

The spelling of 1229572239 in words is "one billion, two hundred twenty-nine million, five hundred seventy-two thousand, two hundred thirty-nine".