1001061081 has 6 divisors (see below), whose sum is σ = 1445977130. Its totient is φ = 667374048.

The previous prime is 1001061073. The next prime is 1001061107. The reversal of 1001061081 is 1801601001.

It can be written as a sum of positive squares in only one way, i.e., 692531856 + 308529225 = 26316^2 + 17565^2 .

It is not a de Polignac number, because 1001061081 - 2³ = 1001061073 is a prime.

It is a super-2 number, since 2×1001061081² = 2004246575785777122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001062081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55614496 + ... + 55614513.

Almost surely, 2^1001061081 is an apocalyptic number.

It is an amenable number.

1001061081 is a deficient number, since it is larger than the sum of its proper divisors (444916049).

1001061081 is a wasteful number, since it uses less digits than its factorization.

1001061081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111229015 (or 111229012 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1001061081 is about 31639.5493172706. The cubic root of 1001061081 is about 1000.3535686411.

Adding to 1001061081 its reverse (1801601001), we get a palindrome (2802662082).

The spelling of 1001061081 in words is "one billion, one million, sixty-one thousand, eighty-one".