1229271200 has 36 divisors (see below), whose sum is σ = 3000960270. Its totient is φ = 491708160.

The previous prime is 1229271191. The next prime is 1229271217. The reversal of 1229271200 is 21729221.

It can be written as a sum of positive squares in 3 ways, for example, as 451307536 + 777963664 = 21244^2 + 27892^2 .

It is a super-2 number, since 2×1229271200² = 3022215366298880000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1229271200.

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, 767495 + ... + 769094.

Almost surely, 2^1229271200 is an apocalyptic number.

1229271200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229271200 is an abundant number, since it is smaller than the sum of its proper divisors (1771689070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1229271200 is a wasteful number, since it uses less digits than its factorization.

1229271200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536609 (or 1536596 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1229271200 is about 35060.9640483544. The cubic root of 1229271200 is about 1071.2296109714.

The spelling of 1229271200 in words is "one billion, two hundred twenty-nine million, two hundred seventy-one thousand, two hundred".