1248091 has 16 divisors (see below), whose sum is σ = 1469440. Its totient is φ = 1049760.

The previous prime is 1248083. The next prime is 1248101. The reversal of 1248091 is 1908421.

It is a happy number.

It is a 8-Lehmer number, since φ(1248091) divides (1248091-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 1248091 - 2³ = 1248083 is a prime.

It is a super-2 number, since 2×1248091² = 3115462288562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248001) 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 15 ways as a sum of consecutive naturals, for example, 7576 + ... + 7738.

It is an arithmetic number, because the mean of its divisors is an integer number (91840).

2^1248091 is an apocalyptic number.

1248091 is a deficient number, since it is larger than the sum of its proper divisors (221349).

1248091 is a wasteful number, since it uses less digits than its factorization.

1248091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1248091 is about 1117.1799317925. The cubic root of 1248091 is about 107.6668690176. Note that the first 3 decimals are identical.

The spelling of 1248091 in words is "one million, two hundred forty-eight thousand, ninety-one".