1400404321 has 4 divisors (see below), whose sum is σ = 1400638144. Its totient is φ = 1400170500.

The previous prime is 1400404309. The next prime is 1400404331. The reversal of 1400404321 is 1234040041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1400404321 - 2¹⁷ = 1400273249 is a prime.

It is a super-2 number, since 2×1400404321² = 3922264524550942082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400404301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107685 + ... + 119986.

It is an arithmetic number, because the mean of its divisors is an integer number (350159536).

Almost surely, 2^1400404321 is an apocalyptic number.

It is an amenable number.

1400404321 is a deficient number, since it is larger than the sum of its proper divisors (233823).

1400404321 is an equidigital number, since it uses as much as digits as its factorization.

1400404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233822.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1400404321 is about 37421.9764443301. The cubic root of 1400404321 is about 1118.7966244377.

Adding to 1400404321 its reverse (1234040041), we get a palindrome (2634444362).

The spelling of 1400404321 in words is "one billion, four hundred million, four hundred four thousand, three hundred twenty-one".