1399275 has 30 divisors (see below), whose sum is σ = 2595692. Its totient is φ = 745200.

The previous prime is 1399273. The next prime is 1399283. The reversal of 1399275 is 5729931.

1399275 = T₃₂₂ + T₃₂₃ + ... + T₃₄₆.

It is not a de Polignac number, because 1399275 - 2¹ = 1399273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1680 + ... + 2370.

2^1399275 is an apocalyptic number.

1399275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1399275 is a deficient number, since it is larger than the sum of its proper divisors (1196417).

1399275 is an equidigital number, since it uses as much as digits as its factorization.

1399275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 699 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 1399275 is about 1182.9095485285. The cubic root of 1399275 is about 111.8495801718.

The spelling of 1399275 in words is "one million, three hundred ninety-nine thousand, two hundred seventy-five".