1225841187 has 8 divisors (see below), whose sum is σ = 1665293904. Its totient is φ = 801807968.

The previous prime is 1225841167. The next prime is 1225841203. The reversal of 1225841187 is 7811485221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225841187 - 2²² = 1221646883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225841147) 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, 3854688 + ... + 3855005.

It is an arithmetic number, because the mean of its divisors is an integer number (208161738).

Almost surely, 2^1225841187 is an apocalyptic number.

1225841187 is a deficient number, since it is larger than the sum of its proper divisors (439452717).

1225841187 is an equidigital number, since it uses as much as digits as its factorization.

1225841187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709749.

The product of its digits is 35840, while the sum is 39.

The square root of 1225841187 is about 35012.0148948900. The cubic root of 1225841187 is about 1070.2323386926.

The spelling of 1225841187 in words is "one billion, two hundred twenty-five million, eight hundred forty-one thousand, one hundred eighty-seven".