21145301 has 2 divisors, whose sum is σ = 21145302. Its totient is φ = 21145300.

The previous prime is 21145261. The next prime is 21145307. The reversal of 21145301 is 10354112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17648401 + 3496900 = 4201^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 21145301 - 2¹⁴ = 21128917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21145301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21145307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572650 + 10572651.

It is an arithmetic number, because the mean of its divisors is an integer number (10572651).

Almost surely, 2^21145301 is an apocalyptic number.

It is an amenable number.

21145301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21145301 is an equidigital number, since it uses as much as digits as its factorization.

21145301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21145301 is about 4598.4020050448. The cubic root of 21145301 is about 276.5272643311.

Adding to 21145301 its reverse (10354112), we get a palindrome (31499413).

The spelling of 21145301 in words is "twenty-one million, one hundred forty-five thousand, three hundred one".