1399015 has 16 divisors (see below), whose sum is σ = 1805760. Its totient is φ = 1036800.

The previous prime is 1399009. The next prime is 1399019. The reversal of 1399015 is 5109931.

It is not a de Polignac number, because 1399015 - 2¹⁷ = 1267943 is a prime.

1399015 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9190 + ... + 9340.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2^1399015 is an apocalyptic number.

1399015 is a deficient number, since it is larger than the sum of its proper divisors (406745).

1399015 is a wasteful number, since it uses less digits than its factorization.

1399015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 1399015 is about 1182.7996449103. The cubic root of 1399015 is about 111.8426521335.

The spelling of 1399015 in words is "one million, three hundred ninety-nine thousand, fifteen".