1393971 has 8 divisors (see below), whose sum is σ = 1873344. Its totient is φ = 921960.

The previous prime is 1393969. The next prime is 1393979. The reversal of 1393971 is 1793931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1393971 - 2¹ = 1393969 is a prime.

1393971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1393979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (234168).

2^1393971 is an apocalyptic number.

1393971 is a deficient number, since it is larger than the sum of its proper divisors (479373).

1393971 is a wasteful number, since it uses less digits than its factorization.

1393971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681.

The product of its digits is 5103, while the sum is 33.

The square root of 1393971 is about 1180.6654903062. The cubic root of 1393971 is about 111.7080780048.

The spelling of 1393971 in words is "one million, three hundred ninety-three thousand, nine hundred seventy-one".