1391960 has 64 divisors (see below), whose sum is σ = 3499200. Its totient is φ = 495616.

The previous prime is 1391941. The next prime is 1391969. The reversal of 1391960 is 691931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15596 + ... + 15684.

It is an arithmetic number, because the mean of its divisors is an integer number (54675).

2^1391960 is an apocalyptic number.

1391960 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 1391960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749600).

1391960 is an abundant number, since it is smaller than the sum of its proper divisors (2107240).

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

1391960 is a wasteful number, since it uses less digits than its factorization.

1391960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1391960 is about 1179.8135445908. The cubic root of 1391960 is about 111.6543339267.

Subtracting from 1391960 its sum of digits (29), we obtain a palindrome (1391931).

The spelling of 1391960 in words is "one million, three hundred ninety-one thousand, nine hundred sixty".