1081255906 has 16 divisors (see below), whose sum is σ = 1628904960. Its totient is φ = 538293600.

The previous prime is 1081255891. The next prime is 1081255907. The reversal of 1081255906 is 6095521801.

It is a super-2 number, since 2×1081255906² = 2338228668519761672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1081255907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553231 + ... + 555181.

It is an arithmetic number, because the mean of its divisors is an integer number (101806560).

Almost surely, 2^1081255906 is an apocalyptic number.

1081255906 is a deficient number, since it is larger than the sum of its proper divisors (547649054).

1081255906 is a wasteful number, since it uses less digits than its factorization.

1081255906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 1081255906 is about 32882.4558997652. The cubic root of 1081255906 is about 1026.3831119202.

The spelling of 1081255906 in words is "one billion, eighty-one million, two hundred fifty-five thousand, nine hundred six".