21701461 has 2 divisors, whose sum is σ = 21701462. Its totient is φ = 21701460.

The previous prime is 21701453. The next prime is 21701467. The reversal of 21701461 is 16410712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21622500 + 78961 = 4650^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 21701461 - 2³ = 21701453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21701467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10850730 + 10850731.

It is an arithmetic number, because the mean of its divisors is an integer number (10850731).

Almost surely, 2^21701461 is an apocalyptic number.

It is an amenable number.

21701461 is a deficient number, since it is larger than the sum of its proper divisors (1).

21701461 is an equidigital number, since it uses as much as digits as its factorization.

21701461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 21701461 is about 4658.4826928948. The cubic root of 21701461 is about 278.9307048180.

The spelling of 21701461 in words is "twenty-one million, seven hundred one thousand, four hundred sixty-one".