1225069992 has 96 divisors (see below), whose sum is σ = 3505101600. Its totient is φ = 385471872.

The previous prime is 1225069991. The next prime is 1225070003. The reversal of 1225069992 is 2999605221.

It is not an unprimeable number, because it can be changed into a prime (1225069991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418518 + ... + 421434.

It is an arithmetic number, because the mean of its divisors is an integer number (36511475).

Almost surely, 2^1225069992 is an apocalyptic number.

1225069992 is a gapful number since it is divisible by the number (12) 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 1225069992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752550800).

1225069992 is an abundant number, since it is smaller than the sum of its proper divisors (2280031608).

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

1225069992 is a wasteful number, since it uses less digits than its factorization.

1225069992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1225069992 is about 35000.9998714322. Note that the first 3 decimals coincide. The cubic root of 1225069992 is about 1070.0078585617.

The spelling of 1225069992 in words is "one billion, two hundred twenty-five million, sixty-nine thousand, nine hundred ninety-two".