1401399 has 12 divisors (see below), whose sum is σ = 2067936. Its totient is φ = 914112.

The previous prime is 1401377. The next prime is 1401401. The reversal of 1401399 is 9931041.

It is not a de Polignac number, because 1401399 - 2⁹ = 1400887 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401319) 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 11 ways as a sum of consecutive naturals, for example, 1234 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (172328).

2^1401399 is an apocalyptic number.

1401399 is a deficient number, since it is larger than the sum of its proper divisors (666537).

1401399 is a wasteful number, since it uses less digits than its factorization.

1401399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366 (or 3363 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1401399 is about 1183.8069944041. The cubic root of 1401399 is about 111.9061447989.

The spelling of 1401399 in words is "one million, four hundred one thousand, three hundred ninety-nine".