1225784265 has 16 divisors (see below), whose sum is σ = 1998260928. Its totient is φ = 641416256.

The previous prime is 1225784249. The next prime is 1225784279. The reversal of 1225784265 is 5624875221.

It is a cyclic number.

It is not a de Polignac number, because 1225784265 - 2⁴ = 1225784249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770139 + ... + 771728.

It is an arithmetic number, because the mean of its divisors is an integer number (124891308).

Almost surely, 2^1225784265 is an apocalyptic number.

1225784265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225784265 is a deficient number, since it is larger than the sum of its proper divisors (772476663).

1225784265 is a wasteful number, since it uses less digits than its factorization.

1225784265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541928.

The product of its digits is 268800, while the sum is 42.

The square root of 1225784265 is about 35011.2019930764. The cubic root of 1225784265 is about 1070.2157730046.

The spelling of 1225784265 in words is "one billion, two hundred twenty-five million, seven hundred eighty-four thousand, two hundred sixty-five".