1225385291 has 8 divisors (see below), whose sum is σ = 1320094944. Its totient is φ = 1130739840.

The previous prime is 1225385251. The next prime is 1225385299. The reversal of 1225385291 is 1925835221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225385291 is a prime.

It is a super-2 number, since 2×1225385291² = 3003138222798309362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225385299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28115 + ... + 56931.

It is an arithmetic number, because the mean of its divisors is an integer number (165011868).

Almost surely, 2^1225385291 is an apocalyptic number.

1225385291 is a deficient number, since it is larger than the sum of its proper divisors (94709653).

1225385291 is a wasteful number, since it uses less digits than its factorization.

1225385291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32101.

The product of its digits is 43200, while the sum is 38.

The square root of 1225385291 is about 35005.5037244145. The cubic root of 1225385291 is about 1070.0996474583.

The spelling of 1225385291 in words is "one billion, two hundred twenty-five million, three hundred eighty-five thousand, two hundred ninety-one".