1421135240 has 96 divisors (see below), whose sum is σ = 3798990720. Its totient is φ = 476848512.

The previous prime is 1421135231. The next prime is 1421135249. The reversal of 1421135240 is 425311241.

It is an interprime number because it is at equal distance from previous prime (1421135231) and next prime (1421135249).

It is not an unprimeable number, because it can be changed into a prime (1421135249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84407 + ... + 99833.

It is an arithmetic number, because the mean of its divisors is an integer number (39572820).

Almost surely, 2^1421135240 is an apocalyptic number.

1421135240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421135240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1899495360).

1421135240 is an abundant number, since it is smaller than the sum of its proper divisors (2377855480).

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

1421135240 is a wasteful number, since it uses less digits than its factorization.

1421135240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15499 (or 15488 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1421135240 is about 37697.9474242299. The cubic root of 1421135240 is about 1124.2903152014.

Adding to 1421135240 its reverse (425311241), we get a palindrome (1846446481).

The spelling of 1421135240 in words is "one billion, four hundred twenty-one million, one hundred thirty-five thousand, two hundred forty".