1225290805 has 8 divisors (see below), whose sum is σ = 1504543392. Its totient is φ = 957436368.

The previous prime is 1225290769. The next prime is 1225290811. The reversal of 1225290805 is 5080925221.

It is a happy number.

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 1225290805 - 2¹³ = 1225282613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2849299 + ... + 2849728.

It is an arithmetic number, because the mean of its divisors is an integer number (188067924).

Almost surely, 2^1225290805 is an apocalyptic number.

It is an amenable number.

1225290805 is a deficient number, since it is larger than the sum of its proper divisors (279252587).

1225290805 is an equidigital number, since it uses as much as digits as its factorization.

1225290805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699075.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1225290805 is about 35004.1541106195. The cubic root of 1225290805 is about 1070.0721426305.

The spelling of 1225290805 in words is "one billion, two hundred twenty-five million, two hundred ninety thousand, eight hundred five".