1225699072 has 144 divisors (see below), whose sum is σ = 2802078720. Its totient is φ = 530804736.

The previous prime is 1225699043. The next prime is 1225699087. The reversal of 1225699072 is 2709965221.

It is a super-2 number, since 2×1225699072² = 3004676430203322368, 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 15 ways as a sum of consecutive naturals, for example, 5128329 + ... + 5128567.

It is an arithmetic number, because the mean of its divisors is an integer number (19458880).

Almost surely, 2^1225699072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225699072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401039360).

1225699072 is an abundant number, since it is smaller than the sum of its proper divisors (1576379648).

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

1225699072 is a wasteful number, since it uses less digits than its factorization.

1225699072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1225699072 is about 35009.9853184774. The cubic root of 1225699072 is about 1070.1909788089.

The spelling of 1225699072 in words is "one billion, two hundred twenty-five million, six hundred ninety-nine thousand, seventy-two".