1239967 has 4 divisors (see below), whose sum is σ = 1242216. Its totient is φ = 1237720.

The previous prime is 1239961. The next prime is 1239971. The reversal of 1239967 is 7699321.

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 1239967 - 2⁷ = 1239839 is a prime.

It is a super-2 number, since 2×1239967² = 3075036322178, which contains 22 as substring.

It is a Duffinian number.

1239967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239961) 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, 333 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (310554).

2^1239967 is an apocalyptic number.

1239967 is a deficient number, since it is larger than the sum of its proper divisors (2249).

1239967 is an equidigital number, since it uses as much as digits as its factorization.

1239967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248.

The product of its digits is 20412, while the sum is 37.

The square root of 1239967 is about 1113.5380550300. The cubic root of 1239967 is about 107.4327540495.

The spelling of 1239967 in words is "one million, two hundred thirty-nine thousand, nine hundred sixty-seven".