1232991 has 6 divisors (see below), whose sum is σ = 1781000. Its totient is φ = 821988.

The previous prime is 1232983. The next prime is 1232999. The reversal of 1232991 is 1992321.

It is an interprime number because it is at equal distance from previous prime (1232983) and next prime (1232999).

It is not a de Polignac number, because 1232991 - 2³ = 1232983 is a prime.

It is a d-powerful number, because it can be written as 1 + 2⁵ + 3¹¹ + 2¹⁹ + 9² + 9⁶ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232999) 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 5 ways as a sum of consecutive naturals, for example, 68491 + ... + 68508.

2^1232991 is an apocalyptic number.

1232991 is a deficient number, since it is larger than the sum of its proper divisors (548009).

1232991 is a wasteful number, since it uses less digits than its factorization.

1232991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137005 (or 137002 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1232991 is about 1110.4012788177. The cubic root of 1232991 is about 107.2309043871.

The spelling of 1232991 in words is "one million, two hundred thirty-two thousand, nine hundred ninety-one".