1070991 has 12 divisors (see below), whose sum is σ = 1560832. Its totient is φ = 707616.

The previous prime is 1070987. The next prime is 1071023. The reversal of 1070991 is 1990701.

It is not a de Polignac number, because 1070991 - 2² = 1070987 is a prime.

It is a super-2 number, since 2×1070991² = 2294043444162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1070921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675 + ... + 1611.

2^1070991 is an apocalyptic number.

1070991 is a deficient number, since it is larger than the sum of its proper divisors (489841).

1070991 is a wasteful number, since it uses less digits than its factorization.

1070991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 1070991 is about 1034.8869503477. The cubic root of 1070991 is about 102.3124788772.

The spelling of 1070991 in words is "one million, seventy thousand, nine hundred ninety-one".