1391072 has 24 divisors (see below), whose sum is σ = 2835000. Its totient is φ = 671104.

The previous prime is 1391057. The next prime is 1391081. The reversal of 1391072 is 2701931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179 + ... + 1677.

It is an arithmetic number, because the mean of its divisors is an integer number (118125).

2^1391072 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 1391072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417500).

1391072 is an abundant number, since it is smaller than the sum of its proper divisors (1443928).

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

1391072 is a wasteful number, since it uses less digits than its factorization.

1391072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1391072 is about 1179.4371539001. The cubic root of 1391072 is about 111.6305856054.

The spelling of 1391072 in words is "one million, three hundred ninety-one thousand, seventy-two".