42730901 has 2 divisors, whose sum is σ = 42730902. Its totient is φ = 42730900.

The previous prime is 42730823. The next prime is 42730903. The reversal of 42730901 is 10903724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 4104676 = 6215^2 + 2026^2 .

It is a cyclic number.

It is not a de Polignac number, because 42730901 - 2¹⁴ = 42714517 is a prime.

Together with 42730903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42730903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21365450 + 21365451.

It is an arithmetic number, because the mean of its divisors is an integer number (21365451).

Almost surely, 2^42730901 is an apocalyptic number.

It is an amenable number.

42730901 is a deficient number, since it is larger than the sum of its proper divisors (1).

42730901 is an equidigital number, since it uses as much as digits as its factorization.

42730901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 42730901 is about 6536.8877151134. The cubic root of 42730901 is about 349.6074537778.

The spelling of 42730901 in words is "forty-two million, seven hundred thirty thousand, nine hundred one".