1400140321 has 4 divisors (see below), whose sum is σ = 1400250672. Its totient is φ = 1400029972.

The previous prime is 1400140307. The next prime is 1400140331. The reversal of 1400140321 is 1230410041.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1400140321 - 2⁵ = 1400140289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400140295 and 1400140304.

It is not an unprimeable number, because it can be changed into a prime (1400140331) 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, 33235 + ... + 62488.

It is an arithmetic number, because the mean of its divisors is an integer number (350062668).

Almost surely, 2^1400140321 is an apocalyptic number.

It is an amenable number.

1400140321 is a deficient number, since it is larger than the sum of its proper divisors (110351).

1400140321 is an equidigital number, since it uses as much as digits as its factorization.

1400140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110350.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1400140321 is about 37418.4489389926. The cubic root of 1400140321 is about 1118.7263159640.

Adding to 1400140321 its reverse (1230410041), we get a palindrome (2630550362).

The spelling of 1400140321 in words is "one billion, four hundred million, one hundred forty thousand, three hundred twenty-one".