42540037 has 2 divisors, whose sum is σ = 42540038. Its totient is φ = 42540036.

The previous prime is 42540019. The next prime is 42540059. The reversal of 42540037 is 73004524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29224836 + 13315201 = 5406^2 + 3649^2 .

It is a cyclic number.

It is not a de Polignac number, because 42540037 - 2⁷ = 42539909 is a prime.

It is a super-2 number, since 2×42540037² = 3619309495922738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42539993 and 42540020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42540067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270018 + 21270019.

It is an arithmetic number, because the mean of its divisors is an integer number (21270019).

Almost surely, 2^42540037 is an apocalyptic number.

It is an amenable number.

42540037 is a deficient number, since it is larger than the sum of its proper divisors (1).

42540037 is an equidigital number, since it uses as much as digits as its factorization.

42540037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 42540037 is about 6522.2723800835. The cubic root of 42540037 is about 349.0861520796.

The spelling of 42540037 in words is "forty-two million, five hundred forty thousand, thirty-seven".