1399706 has 32 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 532800.

The previous prime is 1399691. The next prime is 1399709. The reversal of 1399706 is 6079931.

1399706 = T₁₈₃ + T₁₈₄ + ... + T₂₄₃.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1399709) 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, 9320 + ... + 9468.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

2^1399706 is an apocalyptic number.

1399706 is a deficient number, since it is larger than the sum of its proper divisors (1278694).

1399706 is a wasteful number, since it uses less digits than its factorization.

1399706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1399706 is about 1183.0917124213. The cubic root of 1399706 is about 111.8610628373.

The spelling of 1399706 in words is "one million, three hundred ninety-nine thousand, seven hundred six".