1225612871 has 8 divisors (see below), whose sum is σ = 1400979840. Its totient is φ = 1050315768.

The previous prime is 1225612867. The next prime is 1225612889. The reversal of 1225612871 is 1782165221.

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 1225612871 - 2² = 1225612867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225612831) 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, 28040 + ... + 56898.

It is an arithmetic number, because the mean of its divisors is an integer number (175122480).

Almost surely, 2^1225612871 is an apocalyptic number.

1225612871 is a deficient number, since it is larger than the sum of its proper divisors (175366969).

1225612871 is an equidigital number, since it uses as much as digits as its factorization.

1225612871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34933.

The product of its digits is 13440, while the sum is 35.

The square root of 1225612871 is about 35008.7542051984. The cubic root of 1225612871 is about 1070.1658900800.

The spelling of 1225612871 in words is "one billion, two hundred twenty-five million, six hundred twelve thousand, eight hundred seventy-one".