40247587 has 2 divisors, whose sum is σ = 40247588. Its totient is φ = 40247586.

The previous prime is 40247561. The next prime is 40247593. The reversal of 40247587 is 78574204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40247587 - 2¹¹ = 40245539 is a prime.

It is not a weakly prime, because it can be changed into another prime (40247287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20123793 + 20123794.

It is an arithmetic number, because the mean of its divisors is an integer number (20123794).

Almost surely, 2^40247587 is an apocalyptic number.

40247587 is a deficient number, since it is larger than the sum of its proper divisors (1).

40247587 is an equidigital number, since it uses as much as digits as its factorization.

40247587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 40247587 is about 6344.0985963334. The cubic root of 40247587 is about 342.6993515071.

It can be divided in two parts, 4024 and 7587, that added together give a palindrome (11611).

The spelling of 40247587 in words is "forty million, two hundred forty-seven thousand, five hundred eighty-seven".