1225971292 has 54 divisors (see below), whose sum is σ = 2660288568. Its totient is φ = 484046784.

The previous prime is 1225971221. The next prime is 1225971301. The reversal of 1225971292 is 2921795221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2408334 + ... + 2408842.

Almost surely, 2^1225971292 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 1225971292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330144284).

1225971292 is an abundant number, since it is smaller than the sum of its proper divisors (1434317276).

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

1225971292 is an equidigital number, since it uses as much as digits as its factorization.

1225971292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055 (or 531 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 1225971292 is about 35013.8728506288. The cubic root of 1225971292 is about 1070.2702004902.

The spelling of 1225971292 in words is "one billion, two hundred twenty-five million, nine hundred seventy-one thousand, two hundred ninety-two".