1225778042425 has 48 divisors (see below), whose sum is σ = 1607972083200. Its totient is φ = 925435584000.

The previous prime is 1225778042413. The next prime is 1225778042443. The reversal of 1225778042425 is 5242408775221.

It is not a de Polignac number, because 1225778042425 - 2¹⁹ = 1225777518137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85753579 + ... + 85767871.

It is an arithmetic number, because the mean of its divisors is an integer number (33499418400).

Almost surely, 2^{1225778042425} is an apocalyptic number.

It is an amenable number.

1225778042425 is a deficient number, since it is larger than the sum of its proper divisors (382194040775).

1225778042425 is a wasteful number, since it uses less digits than its factorization.

1225778042425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17074 (or 17069 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 49.

The spelling of 1225778042425 in words is "one trillion, two hundred twenty-five billion, seven hundred seventy-eight million, forty-two thousand, four hundred twenty-five".