1225054857 has 8 divisors (see below), whose sum is σ = 1759053184. Its totient is φ = 753879888.

The previous prime is 1225054823. The next prime is 1225054861. The reversal of 1225054857 is 7584505221.

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

It is not a de Polignac number, because 1225054857 - 2⁷ = 1225054729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 31411663 = 1225054857 / (1 + 2 + 2 + 5 + 0 + 5 + 4 + 8 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225054057) 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, 15705793 + ... + 15705870.

It is an arithmetic number, because the mean of its divisors is an integer number (219881648).

Almost surely, 2^1225054857 is an apocalyptic number.

It is an amenable number.

1225054857 is a deficient number, since it is larger than the sum of its proper divisors (533998327).

1225054857 is a wasteful number, since it uses less digits than its factorization.

1225054857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31411679.

The product of its (nonzero) digits is 112000, while the sum is 39.

The square root of 1225054857 is about 35000.7836626553. The cubic root of 1225054857 is about 1070.0034521099.

The spelling of 1225054857 in words is "one billion, two hundred twenty-five million, fifty-four thousand, eight hundred fifty-seven".