42555701 has 2 divisors, whose sum is σ = 42555702. Its totient is φ = 42555700.

The previous prime is 42555659. The next prime is 42555703. The reversal of 42555701 is 10755524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38254225 + 4301476 = 6185^2 + 2074^2 .

It is a cyclic number.

It is not a de Polignac number, because 42555701 - 2²² = 38361397 is a prime.

Together with 42555703, 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 (42555703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21277850 + 21277851.

It is an arithmetic number, because the mean of its divisors is an integer number (21277851).

Almost surely, 2^42555701 is an apocalyptic number.

It is an amenable number.

42555701 is a deficient number, since it is larger than the sum of its proper divisors (1).

42555701 is an equidigital number, since it uses as much as digits as its factorization.

42555701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 42555701 is about 6523.4730780467. The cubic root of 42555701 is about 349.1289934032.

The spelling of 42555701 in words is "forty-two million, five hundred fifty-five thousand, seven hundred one".