1421440312 has 64 divisors (see below), whose sum is σ = 2990995200. Its totient is φ = 629337600.

The previous prime is 1421440291. The next prime is 1421440313. The reversal of 1421440312 is 2130441241.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421440313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388363 + ... + 392005.

It is an arithmetic number, because the mean of its divisors is an integer number (46734300).

Almost surely, 2^1421440312 is an apocalyptic number.

It is an amenable number.

1421440312 is an abundant number, since it is smaller than the sum of its proper divisors (1569554888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421440312 is a wasteful number, since it uses less digits than its factorization.

1421440312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836 (or 3832 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1421440312 is about 37701.9934751466. The cubic root of 1421440312 is about 1124.3707590947.

Adding to 1421440312 its reverse (2130441241), we get a palindrome (3551881553).

The spelling of 1421440312 in words is "one billion, four hundred twenty-one million, four hundred forty thousand, three hundred twelve".