42901 has 2 divisors, whose sum is σ = 42902. Its totient is φ = 42900.
The previous prime is 42899. The next prime is 42923. The reversal of 42901 is 10924.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 40401 + 2500 = 201^2 + 50^2 .
It is a cyclic number.
It is not a de Polignac number, because 42901 - 21 = 42899 is a prime.
Together with 42899, it forms a pair of twin primes.
It is an Ulam number.
It is a nialpdrome in base 15.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (42961) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21450 + 21451.
It is an arithmetic number, because the mean of its divisors is an integer number (21451).
242901 is an apocalyptic number.
It is an amenable number.
42901 is a deficient number, since it is larger than the sum of its proper divisors (1).
42901 is an equidigital number, since it uses as much as digits as its factorization.
42901 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 72, while the sum is 16.
The square root of 42901 is about 207.1255657808. The cubic root of 42901 is about 35.0070734003.
The spelling of 42901 in words is "forty-two thousand, nine hundred one".
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