1229250000 has 280 divisors, whose sum is σ = 4359319200. Its totient is φ = 296000000.

The previous prime is 1229249981. The next prime is 1229250017. The reversal of 1229250000 is 529221.

It is a super-2 number, since 2×1229250000² = 3022111125000000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8249926 + ... + 8250074.

Almost surely, 2^1229250000 is an apocalyptic number.

1229250000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2179659600).

1229250000 is an abundant number, since it is smaller than the sum of its proper divisors (3130069200).

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

1229250000 is an equidigital number, since it uses as much as digits as its factorization.

1229250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1229250000 is about 35060.6617165164. The cubic root of 1229250000 is about 1071.2234527973.

Adding to 1229250000 its reverse (529221), we get a palindrome (1229779221).

The spelling of 1229250000 in words is "one billion, two hundred twenty-nine million, two hundred fifty thousand".