1421513340 has 96 divisors (see below), whose sum is σ = 4334783040. Its totient is φ = 345962496.

The previous prime is 1421513333. The next prime is 1421513341. The reversal of 1421513340 is 433151241.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421513340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421513341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59182 + ... + 79658.

It is an arithmetic number, because the mean of its divisors is an integer number (45153990).

Almost surely, 2^1421513340 is an apocalyptic number.

1421513340 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 1421513340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2167391520).

1421513340 is an abundant number, since it is smaller than the sum of its proper divisors (2913269700).

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

1421513340 is a wasteful number, since it uses less digits than its factorization.

1421513340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20591 (or 20589 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1421513340 is about 37702.9619526106. The cubic root of 1421513340 is about 1124.3900140108.

Adding to 1421513340 its reverse (433151241), we get a palindrome (1854664581).

The spelling of 1421513340 in words is "one billion, four hundred twenty-one million, five hundred thirteen thousand, three hundred forty".