42501287 has 2 divisors, whose sum is σ = 42501288. Its totient is φ = 42501286.

The previous prime is 42501259. The next prime is 42501293. The reversal of 42501287 is 78210524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42501287 - 2¹⁶ = 42435751 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42501787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21250643 + 21250644.

It is an arithmetic number, because the mean of its divisors is an integer number (21250644).

Almost surely, 2^42501287 is an apocalyptic number.

42501287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42501287 is an equidigital number, since it uses as much as digits as its factorization.

42501287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42501287 is about 6519.3011128494. The cubic root of 42501287 is about 348.9801249208.

The spelling of 42501287 in words is "forty-two million, five hundred one thousand, two hundred eighty-seven".