1400411821 has 2 divisors, whose sum is σ = 1400411822. Its totient is φ = 1400411820.

The previous prime is 1400411819. The next prime is 1400411863. The reversal of 1400411821 is 1281140041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 799475625 + 600936196 = 28275^2 + 24514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400411821 - 2¹ = 1400411819 is a prime.

It is a super-2 number, since 2×1400411821² = 3922306536793072082, which contains 22 as substring.

Together with 1400411819, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1400411792 and 1400411801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400411801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700205910 + 700205911.

It is an arithmetic number, because the mean of its divisors is an integer number (700205911).

Almost surely, 2^1400411821 is an apocalyptic number.

It is an amenable number.

1400411821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400411821 is an equidigital number, since it uses as much as digits as its factorization.

1400411821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1400411821 is about 37422.0766526926. The cubic root of 1400411821 is about 1118.7986217084.

Adding to 1400411821 its reverse (1281140041), we get a palindrome (2681551862).

The spelling of 1400411821 in words is "one billion, four hundred million, four hundred eleven thousand, eight hundred twenty-one".