1072091 has 4 divisors (see below), whose sum is σ = 1077384. Its totient is φ = 1066800.

The previous prime is 1072039. The next prime is 1072103. The reversal of 1072091 is 1902701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1902701 = 47 ⋅40483.

It is a cyclic number.

It is not a de Polignac number, because 1072091 - 2¹⁰ = 1071067 is a prime.

It is a super-2 number, since 2×1072091² = 2298758224562, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330 + ... + 2751.

It is an arithmetic number, because the mean of its divisors is an integer number (269346).

2^1072091 is an apocalyptic number.

1072091 is a deficient number, since it is larger than the sum of its proper divisors (5293).

1072091 is an equidigital number, since it uses as much as digits as its factorization.

1072091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1072091 is about 1035.4182729699. The cubic root of 1072091 is about 102.3474948011.

Adding to 1072091 its reverse (1902701), we get a palindrome (2974792).

The spelling of 1072091 in words is "one million, seventy-two thousand, ninety-one".