1173561425 has 24 divisors (see below), whose sum is σ = 1542838752. Its totient is φ = 882464000.

The previous prime is 1173561421. The next prime is 1173561427. The reversal of 1173561425 is 5241653711.

It is a happy number.

It is not a de Polignac number, because 1173561425 - 2² = 1173561421 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1173561421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462410 + ... + 464940.

It is an arithmetic number, because the mean of its divisors is an integer number (64284948).

Almost surely, 2^1173561425 is an apocalyptic number.

It is an amenable number.

1173561425 is a deficient number, since it is larger than the sum of its proper divisors (369277327).

1173561425 is a wasteful number, since it uses less digits than its factorization.

1173561425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649 (or 3644 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 1173561425 is about 34257.2828023473. The cubic root of 1173561425 is about 1054.7963264422.

The spelling of 1173561425 in words is "one billion, one hundred seventy-three million, five hundred sixty-one thousand, four hundred twenty-five".