1399901 has 4 divisors (see below), whose sum is σ = 1473600. Its totient is φ = 1326204.

The previous prime is 1399883. The next prime is 1399913. The reversal of 1399901 is 1099931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1099931 = 7 ⋅157133.

It is a cyclic number.

It is not a de Polignac number, because 1399901 - 2⁶ = 1399837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36821 + ... + 36858.

It is an arithmetic number, because the mean of its divisors is an integer number (368400).

2^1399901 is an apocalyptic number.

It is an amenable number.

1399901 is a deficient number, since it is larger than the sum of its proper divisors (73699).

1399901 is an equidigital number, since it uses as much as digits as its factorization.

1399901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73698.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1399901 is about 1183.1741207447. The cubic root of 1399901 is about 111.8662572363.

The spelling of 1399901 in words is "one million, three hundred ninety-nine thousand, nine hundred one".