1229144272 has 30 divisors (see below), whose sum is σ = 2399562998. Its totient is φ = 609937152.

The previous prime is 1229144269. The next prime is 1229144281. The reversal of 1229144272 is 2724419221.

It can be written as a sum of positive squares in 3 ways, for example, as 220700736 + 1008443536 = 14856^2 + 31756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298258 + ... + 302350.

Almost surely, 2^1229144272 is an apocalyptic number.

It is an amenable number.

1229144272 is a deficient number, since it is larger than the sum of its proper divisors (1170418726).

1229144272 is an equidigital number, since it uses as much as digits as its factorization.

1229144272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375 (or 4232 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 1229144272 is about 35059.1538973775. The cubic root of 1229144272 is about 1071.1927398800.

The spelling of 1229144272 in words is "one billion, two hundred twenty-nine million, one hundred forty-four thousand, two hundred seventy-two".