1391000 has 64 divisors (see below), whose sum is σ = 3538080. Its totient is φ = 508800.

The previous prime is 1390993. The next prime is 1391011. The reversal of 1391000 is 1931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12947 + ... + 13053.

2^1391000 is an apocalyptic number.

1391000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769040).

1391000 is an abundant number, since it is smaller than the sum of its proper divisors (2147080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1391000 is a wasteful number, since it uses less digits than its factorization.

1391000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 1391000 is about 1179.4066304714. The cubic root of 1391000 is about 111.6286596229.

Adding to 1391000 its reverse (1931), we get a palindrome (1392931).

The spelling of 1391000 in words is "one million, three hundred ninety-one thousand".