1399131 has 12 divisors (see below), whose sum is σ = 2046408. Its totient is φ = 921024.

The previous prime is 1399129. The next prime is 1399133. The reversal of 1399131 is 1319931.

It is an interprime number because it is at equal distance from previous prime (1399129) and next prime (1399133).

It is not a de Polignac number, because 1399131 - 2¹ = 1399129 is a prime.

It is a super-2 number, since 2×1399131² = 3915135110322, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1399095 and 1399104.

It is not an unprimeable number, because it can be changed into a prime (1399133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (170534).

2^1399131 is an apocalyptic number.

1399131 is a deficient number, since it is larger than the sum of its proper divisors (647277).

1399131 is a wasteful number, since it uses less digits than its factorization.

1399131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1959 counting only the distinct ones).

The product of its digits is 729, while the sum is 27.

The square root of 1399131 is about 1182.8486800940. The cubic root of 1399131 is about 111.8457432105.

The spelling of 1399131 in words is "one million, three hundred ninety-nine thousand, one hundred thirty-one".