1081529225 has 18 divisors (see below), whose sum is σ = 1560052494. Its totient is φ = 741619200.

The previous prime is 1081529221. The next prime is 1081529257. The reversal of 1081529225 is 5229251801.

It can be written as a sum of positive squares in 3 ways, for example, as 195216784 + 886312441 = 13972^2 + 29771^2 .

It is not a de Polignac number, because 1081529225 - 2² = 1081529221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (1081529221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 440216 + ... + 442665.

It is an arithmetic number, because the mean of its divisors is an integer number (86669583).

Almost surely, 2^1081529225 is an apocalyptic number.

It is an amenable number.

1081529225 is a deficient number, since it is larger than the sum of its proper divisors (478523269).

1081529225 is an equidigital number, since it uses as much as digits as its factorization.

1081529225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882905 (or 882893 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 1081529225 is about 32886.6116375646. The cubic root of 1081529225 is about 1026.4695874006.

The spelling of 1081529225 in words is "one billion, eighty-one million, five hundred twenty-nine thousand, two hundred twenty-five".