1081272225 has 24 divisors (see below), whose sum is σ = 1950223392. Its totient is φ = 524252800.

The previous prime is 1081272211. The next prime is 1081272293. The reversal of 1081272225 is 5222721801.

It is not a de Polignac number, because 1081272225 - 2⁴ = 1081272209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1081272192 and 1081272201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 654492 + ... + 656141.

It is an arithmetic number, because the mean of its divisors is an integer number (81259308).

Almost surely, 2^1081272225 is an apocalyptic number.

1081272225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1081272225 is a deficient number, since it is larger than the sum of its proper divisors (868951167).

1081272225 is a wasteful number, since it uses less digits than its factorization.

1081272225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310657 (or 1310652 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1081272225 is about 32882.7040402702. The cubic root of 1081272225 is about 1026.3882755025.

The spelling of 1081272225 in words is "one billion, eighty-one million, two hundred seventy-two thousand, two hundred twenty-five".