13421540 has 24 divisors (see below), whose sum is σ = 30748032. Its totient is φ = 4880480.

The previous prime is 13421539. The next prime is 13421563. The reversal of 13421540 is 4512431.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30284 + ... + 30723.

It is an arithmetic number, because the mean of its divisors is an integer number (1281168).

Almost surely, 2^13421540 is an apocalyptic number.

13421540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421540 is an abundant number, since it is smaller than the sum of its proper divisors (17326492).

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

13421540 is a wasteful number, since it uses less digits than its factorization.

13421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61027 (or 61025 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 13421540 is about 3663.5420019429. The cubic root of 13421540 is about 237.6479742675.

Adding to 13421540 its reverse (4512431), we get a palindrome (17933971).

It can be divided in two parts, 1342 and 1540, that added together give a palindrome (2882).

The spelling of 13421540 in words is "thirteen million, four hundred twenty-one thousand, five hundred forty".