1400621 has 4 divisors (see below), whose sum is σ = 1423644. Its totient is φ = 1377600.

The previous prime is 1400599. The next prime is 1400627. The reversal of 1400621 is 1260041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1260041 = 883 ⋅1427.

It can be written as a sum of positive squares in 2 ways, for example, as 422500 + 978121 = 650^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400621 - 2⁶ = 1400557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400596 and 1400605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11420 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (355911).

2^1400621 is an apocalyptic number.

It is an amenable number.

1400621 is a deficient number, since it is larger than the sum of its proper divisors (23023).

1400621 is an equidigital number, since it uses as much as digits as its factorization.

1400621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23022.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1400621 is about 1183.4783479219. The cubic root of 1400621 is about 111.8854323782.

Adding to 1400621 its reverse (1260041), we get a palindrome (2660662).

The spelling of 1400621 in words is "one million, four hundred thousand, six hundred twenty-one".