1050991 has 8 divisors (see below), whose sum is σ = 1121904. Its totient is φ = 981120.

The previous prime is 1050977. The next prime is 1050997. The reversal of 1050991 is 1990501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1050991 - 2¹³ = 1042799 is a prime.

It is a super-2 number, since 2×1050991² = 2209164164162, 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 (1050997) 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, 3441 + ... + 3733.

It is an arithmetic number, because the mean of its divisors is an integer number (140238).

2^1050991 is an apocalyptic number.

1050991 is a deficient number, since it is larger than the sum of its proper divisors (70913).

1050991 is a wasteful number, since it uses less digits than its factorization.

1050991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 1050991 is about 1025.1785210391. The cubic root of 1050991 is about 101.6716017790.

The spelling of 1050991 in words is "one million, fifty thousand, nine hundred ninety-one".