1391012 has 36 divisors (see below), whose sum is σ = 2911104. Its totient is φ = 579600.

The previous prime is 1391011. The next prime is 1391023. The reversal of 1391012 is 2101931.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1391011) 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, 9137 + ... + 9287.

It is an arithmetic number, because the mean of its divisors is an integer number (80864).

2^1391012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1455552).

1391012 is an abundant number, since it is smaller than the sum of its proper divisors (1520092).

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

1391012 is a wasteful number, since it uses less digits than its factorization.

1391012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1391012 is about 1179.4117177644. The cubic root of 1391012 is about 111.6289806246.

Adding to 1391012 its reverse (2101931), we get a palindrome (3492943).

The spelling of 1391012 in words is "one million, three hundred ninety-one thousand, twelve".