1400013 has 6 divisors (see below), whose sum is σ = 2022254. Its totient is φ = 933336.

The previous prime is 1399999. The next prime is 1400017. The reversal of 1400013 is 3100041.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 59049 = 1158^2 + 243^2 .

It is not a de Polignac number, because 1400013 - 2¹⁶ = 1334477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 155557 = 1400013 / (1 + 4 + 0 + 0 + 0 + 1 + 3).

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1399968 and 1400004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77770 + ... + 77787.

2^1400013 is an apocalyptic number.

It is an amenable number.

1400013 is a deficient number, since it is larger than the sum of its proper divisors (622241).

1400013 is a wasteful number, since it uses less digits than its factorization.

1400013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155563 (or 155560 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1400013 is about 1183.2214501098. The cubic root of 1400013 is about 111.8692404679.

Adding to 1400013 its reverse (3100041), we get a palindrome (4500054).

The spelling of 1400013 in words is "one million, four hundred thousand, thirteen".