1225917693 has 128 divisors (see below), whose sum is σ = 2478551040. Its totient is φ = 578223360.

The previous prime is 1225917683. The next prime is 1225917703. The reversal of 1225917693 is 3967195221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1225917683) and next prime (1225917703).

It is not a de Polignac number, because 1225917693 - 2¹⁸ = 1225655549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225917653) 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 127 ways as a sum of consecutive naturals, for example, 1810471 + ... + 1811147.

It is an arithmetic number, because the mean of its divisors is an integer number (19363680).

Almost surely, 2^1225917693 is an apocalyptic number.

1225917693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1225917693 is an abundant number, since it is smaller than the sum of its proper divisors (1252633347).

1225917693 is a wasteful number, since it uses less digits than its factorization.

1225917693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 778 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 1225917693 is about 35013.1074456410. The cubic root of 1225917693 is about 1070.2546029938.

The spelling of 1225917693 in words is "one billion, two hundred twenty-five million, nine hundred seventeen thousand, six hundred ninety-three".