13421563 has 2 divisors, whose sum is σ = 13421564. Its totient is φ = 13421562.

The previous prime is 13421539. The next prime is 13421567. The reversal of 13421563 is 36512431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13421563 - 2¹³ = 13413371 is a prime.

It is not a weakly prime, because it can be changed into another prime (13421567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710781 + 6710782.

It is an arithmetic number, because the mean of its divisors is an integer number (6710782).

Almost surely, 2^13421563 is an apocalyptic number.

13421563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421563 is an equidigital number, since it uses as much as digits as its factorization.

13421563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 13421563 is about 3663.5451409803. The cubic root of 13421563 is about 237.6481100170.

Adding to 13421563 its reverse (36512431), we get a palindrome (49933994).

The spelling of 13421563 in words is "thirteen million, four hundred twenty-one thousand, five hundred sixty-three".