21348601 has 2 divisors, whose sum is σ = 21348602. Its totient is φ = 21348600.

The previous prime is 21348589. The next prime is 21348629. The reversal of 21348601 is 10684312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15023376 + 6325225 = 3876^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 21348601 - 2¹³ = 21340409 is a prime.

It is not a weakly prime, because it can be changed into another prime (21348641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10674300 + 10674301.

It is an arithmetic number, because the mean of its divisors is an integer number (10674301).

Almost surely, 2^21348601 is an apocalyptic number.

It is an amenable number.

21348601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21348601 is an equidigital number, since it uses as much as digits as its factorization.

21348601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21348601 is about 4620.4546313106. The cubic root of 21348601 is about 277.4106565181.

The spelling of 21348601 in words is "twenty-one million, three hundred forty-eight thousand, six hundred one".