1299023 has 4 divisors (see below), whose sum is σ = 1417128. Its totient is φ = 1180920.

The previous prime is 1299019. The next prime is 1299029. The reversal of 1299023 is 3209921.

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 1299023 - 2² = 1299019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1298983 and 1299001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299029) 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, 59036 + ... + 59057.

It is an arithmetic number, because the mean of its divisors is an integer number (354282).

2^1299023 is an apocalyptic number.

1299023 is a deficient number, since it is larger than the sum of its proper divisors (118105).

1299023 is a wasteful number, since it uses less digits than its factorization.

1299023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118104.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1299023 is about 1139.7469017286. The cubic root of 1299023 is about 109.1119406631. Note that the first 3 decimals are identical.

The spelling of 1299023 in words is "one million, two hundred ninety-nine thousand, twenty-three".