4006537 has 2 divisors, whose sum is σ = 4006538. Its totient is φ = 4006536.

The previous prime is 4006529. The next prime is 4006547. The reversal of 4006537 is 7356004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3798601 + 207936 = 1949^2 + 456^2 .

It is a cyclic number.

It is not a de Polignac number, because 4006537 - 2³ = 4006529 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4006517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003268 + 2003269.

It is an arithmetic number, because the mean of its divisors is an integer number (2003269).

Almost surely, 2^4006537 is an apocalyptic number.

It is an amenable number.

4006537 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006537 is an equidigital number, since it uses as much as digits as its factorization.

4006537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 4006537 is about 2001.6335828518. The cubic root of 4006537 is about 158.8265318053.

The spelling of 4006537 in words is "four million, six thousand, five hundred thirty-seven".