13421403 has 32 divisors (see below), whose sum is σ = 20980800. Its totient is φ = 8467200.

The previous prime is 13421399. The next prime is 13421407. The reversal of 13421403 is 30412431.

It is an interprime number because it is at equal distance from previous prime (13421399) and next prime (13421407).

It is not a de Polignac number, because 13421403 - 2² = 13421399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13421407) 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, 47623 + ... + 47903.

It is an arithmetic number, because the mean of its divisors is an integer number (655650).

Almost surely, 2^13421403 is an apocalyptic number.

13421403 is a deficient number, since it is larger than the sum of its proper divisors (7559397).

13421403 is a wasteful number, since it uses less digits than its factorization.

13421403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13421403 is about 3663.5233041432. The cubic root of 13421403 is about 237.6471656697.

Adding to 13421403 its reverse (30412431), we get a palindrome (43833834).

It can be divided in two parts, 13421 and 403, that added together give a cube (13824 = 24³).

The spelling of 13421403 in words is "thirteen million, four hundred twenty-one thousand, four hundred three".