1400001 has 16 divisors (see below), whose sum is σ = 2003904. Its totient is φ = 866304.

The previous prime is 1399999. The next prime is 1400017. The reversal of 1400001 is 1000041.

It is not a de Polignac number, because 1400001 - 2¹ = 1399999 is a prime.

It is an Ulam 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 (1400051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4806 + ... + 5088.

It is an arithmetic number, because the mean of its divisors is an integer number (125244).

2^1400001 is an apocalyptic number.

It is an amenable number.

1400001 is a deficient number, since it is larger than the sum of its proper divisors (603903).

1400001 is a wasteful number, since it uses less digits than its factorization.

1400001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1400001 is about 1183.2163791970. The cubic root of 1400001 is about 111.8689208436.

Adding to 1400001 its reverse (1000041), we get a palindrome (2400042).

The spelling of 1400001 in words is "one million, four hundred thousand, one".