1225949340 has 192 divisors, whose sum is σ = 4296499200. Its totient is φ = 253743360.

The previous prime is 1225949327. The next prime is 1225949357. The reversal of 1225949340 is 439495221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2046361 + ... + 2046959.

It is an arithmetic number, because the mean of its divisors is an integer number (22377600).

Almost surely, 2^1225949340 is an apocalyptic number.

1225949340 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 1225949340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2148249600).

1225949340 is an abundant number, since it is smaller than the sum of its proper divisors (3070549860).

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

1225949340 is a wasteful number, since it uses less digits than its factorization.

1225949340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1225949340 is about 35013.5593734770. The cubic root of 1225949340 is about 1070.2638124364.

The spelling of 1225949340 in words is "one billion, two hundred twenty-five million, nine hundred forty-nine thousand, three hundred forty".