1225892578 has 16 divisors (see below), whose sum is σ = 1936383840. Its totient is φ = 580456800.

The previous prime is 1225892557. The next prime is 1225892609. The reversal of 1225892578 is 8752985221.

It is a super-2 number, since 2×1225892578² = 3005625225590972168, which contains 22 as substring.

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, 128038 + ... + 137278.

It is an arithmetic number, because the mean of its divisors is an integer number (121023990).

Almost surely, 2^1225892578 is an apocalyptic number.

1225892578 is a deficient number, since it is larger than the sum of its proper divisors (710491262).

1225892578 is a wasteful number, since it uses less digits than its factorization.

1225892578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12753.

The product of its digits is 806400, while the sum is 49.

The square root of 1225892578 is about 35012.7487924042. The cubic root of 1225892578 is about 1070.2472942845.

The spelling of 1225892578 in words is "one billion, two hundred twenty-five million, eight hundred ninety-two thousand, five hundred seventy-eight".