1229591 has 4 divisors (see below), whose sum is σ = 1341384. Its totient is φ = 1117800.

The previous prime is 1229581. The next prime is 1229597. The reversal of 1229591 is 1959221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1229591 - 2¹⁰ = 1228567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229597) 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, 55880 + ... + 55901.

It is an arithmetic number, because the mean of its divisors is an integer number (335346).

2^1229591 is an apocalyptic number.

1229591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1229591 is a deficient number, since it is larger than the sum of its proper divisors (111793).

1229591 is a wasteful number, since it uses less digits than its factorization.

1229591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111792.

The product of its digits is 1620, while the sum is 29.

The square root of 1229591 is about 1108.8692438696. The cubic root of 1229591 is about 107.1322497859.

The spelling of 1229591 in words is "one million, two hundred twenty-nine thousand, five hundred ninety-one".