1400643 has 6 divisors (see below), whose sum is σ = 2023164. Its totient is φ = 933756.

The previous prime is 1400627. The next prime is 1400653. The reversal of 1400643 is 3460041.

It is not a de Polignac number, because 1400643 - 2⁴ = 1400627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1400653) 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, 77805 + ... + 77822.

It is an arithmetic number, because the mean of its divisors is an integer number (337194).

2^1400643 is an apocalyptic number.

1400643 is a deficient number, since it is larger than the sum of its proper divisors (622521).

1400643 is a wasteful number, since it uses less digits than its factorization.

1400643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155633 (or 155630 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1400643 is about 1183.4876425210. The cubic root of 1400643 is about 111.8860181818.

Adding to 1400643 its reverse (3460041), we get a palindrome (4860684).

The spelling of 1400643 in words is "one million, four hundred thousand, six hundred forty-three".