1220227725 has 12 divisors (see below), whose sum is σ = 2017443296. Its totient is φ = 650788080.

The previous prime is 1220227711. The next prime is 1220227753. The reversal of 1220227725 is 5277220221.

It is not a de Polignac number, because 1220227725 - 2¹⁵ = 1220194957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220227692 and 1220227701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8134777 + ... + 8134926.

Almost surely, 2^1220227725 is an apocalyptic number.

1220227725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220227725 is a deficient number, since it is larger than the sum of its proper divisors (797215571).

1220227725 is a wasteful number, since it uses less digits than its factorization.

1220227725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16269716 (or 16269711 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 1220227725 is about 34931.7581149303. The cubic root of 1220227725 is about 1068.5962098741.

Adding to 1220227725 its reverse (5277220221), we get a palindrome (6497447946).

The spelling of 1220227725 in words is "one billion, two hundred twenty million, two hundred twenty-seven thousand, seven hundred twenty-five".