1399207 has 4 divisors (see below), whose sum is σ = 1433376. Its totient is φ = 1365040.

The previous prime is 1399201. The next prime is 1399213. The reversal of 1399207 is 7029931.

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

It is an interprime number because it is at equal distance from previous prime (1399201) and next prime (1399213).

It is a cyclic number.

It is not a de Polignac number, because 1399207 - 2³ = 1399199 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399201) 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, 17023 + ... + 17104.

It is an arithmetic number, because the mean of its divisors is an integer number (358344).

2^1399207 is an apocalyptic number.

1399207 is a deficient number, since it is larger than the sum of its proper divisors (34169).

1399207 is an equidigital number, since it uses as much as digits as its factorization.

1399207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34168.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1399207 is about 1182.8808054914. The cubic root of 1399207 is about 111.8477683062.

The spelling of 1399207 in words is "one million, three hundred ninety-nine thousand, two hundred seven".