42150509 has 2 divisors, whose sum is σ = 42150510. Its totient is φ = 42150508.

The previous prime is 42150503. The next prime is 42150547. The reversal of 42150509 is 90505124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31326409 + 10824100 = 5597^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 42150509 - 2¹² = 42146413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42150503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21075254 + 21075255.

It is an arithmetic number, because the mean of its divisors is an integer number (21075255).

Almost surely, 2^42150509 is an apocalyptic number.

It is an amenable number.

42150509 is a deficient number, since it is larger than the sum of its proper divisors (1).

42150509 is an equidigital number, since it uses as much as digits as its factorization.

42150509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 42150509 is about 6492.3423353979. The cubic root of 42150509 is about 348.0173863908.

The spelling of 42150509 in words is "forty-two million, one hundred fifty thousand, five hundred nine".