1400240321 has 16 divisors (see below), whose sum is σ = 1565995200. Its totient is φ = 1246166208.

The previous prime is 1400240297. The next prime is 1400240329. The reversal of 1400240321 is 1230420041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400240321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1400240321.

It is not an unprimeable number, because it can be changed into a prime (1400240329) 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 in 15 ways as a sum of consecutive naturals, for example, 13955 + ... + 54728.

It is an arithmetic number, because the mean of its divisors is an integer number (97874700).

Almost surely, 2^1400240321 is an apocalyptic number.

It is an amenable number.

1400240321 is a deficient number, since it is larger than the sum of its proper divisors (165754879).

1400240321 is a wasteful number, since it uses less digits than its factorization.

1400240321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68768.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1400240321 is about 37419.7851543806. The cubic root of 1400240321 is about 1118.7529490013.

Adding to 1400240321 its reverse (1230420041), we get a palindrome (2630660362).

The spelling of 1400240321 in words is "one billion, four hundred million, two hundred forty thousand, three hundred twenty-one".