1097729425 has 12 divisors (see below), whose sum is σ = 1465891420. Its totient is φ = 810630720.

The previous prime is 1097729419. The next prime is 1097729443. The reversal of 1097729425 is 5249277901.

It is a happy number.

It is a Cunningham number, because it is equal to 33132²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 1097729424 = 1^2 + 33132^2 .

It is not a de Polignac number, because 1097729425 - 2³ = 1097729417 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1688490 + ... + 1689139.

Almost surely, 2^1097729425 is an apocalyptic number.

It is an amenable number.

1097729425 is a deficient number, since it is larger than the sum of its proper divisors (368161995).

1097729425 is a wasteful number, since it uses less digits than its factorization.

1097729425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377652 (or 3377647 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 1097729425 is about 33132.0000150912. Note that the first 4 decimals coincide. The cubic root of 1097729425 is about 1031.5693627347.

The spelling of 1097729425 in words is "one billion, ninety-seven million, seven hundred twenty-nine thousand, four hundred twenty-five".