1421440331 has 8 divisors (see below), whose sum is σ = 1521614400. Its totient is φ = 1323802440.

The previous prime is 1421440313. The next prime is 1421440351. The reversal of 1421440331 is 1330441241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421440331 - 2²² = 1417246027 is a prime.

It is a super-2 number, since 2×1421440331² = 4040985229186779122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421440297 and 1421440306.

It is not an unprimeable number, because it can be changed into a prime (1421440351) 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 7 ways as a sum of consecutive naturals, for example, 632885 + ... + 635126.

It is an arithmetic number, because the mean of its divisors is an integer number (190201800).

Almost surely, 2^1421440331 is an apocalyptic number.

1421440331 is a deficient number, since it is larger than the sum of its proper divisors (100174069).

1421440331 is a wasteful number, since it uses less digits than its factorization.

1421440331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268089.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1421440331 is about 37701.9937271227. The cubic root of 1421440331 is about 1124.3707641044.

Adding to 1421440331 its reverse (1330441241), we get a palindrome (2751881572).

It can be divided in two parts, 14214 and 40331, that added together give a palindrome (54545).

The spelling of 1421440331 in words is "one billion, four hundred twenty-one million, four hundred forty thousand, three hundred thirty-one".