1421533240 has 16 divisors (see below), whose sum is σ = 3198449880. Its totient is φ = 568613280.

The previous prime is 1421533231. The next prime is 1421533249. The reversal of 1421533240 is 423351241.

It is an interprime number because it is at equal distance from previous prime (1421533231) and next prime (1421533249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421533249) 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, 17769126 + ... + 17769205.

Almost surely, 2^1421533240 is an apocalyptic number.

1421533240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421533240 is an abundant number, since it is smaller than the sum of its proper divisors (1776916640).

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

1421533240 is a wasteful number, since it uses less digits than its factorization.

1421533240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35538342 (or 35538338 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1421533240 is about 37703.2258566823. The cubic root of 1421533240 is about 1124.3952608268.

Adding to 1421533240 its reverse (423351241), we get a palindrome (1844884481).

The spelling of 1421533240 in words is "one billion, four hundred twenty-one million, five hundred thirty-three thousand, two hundred forty".