4015987 has 2 divisors, whose sum is σ = 4015988. Its totient is φ = 4015986.

The previous prime is 4015981. The next prime is 4015993. The reversal of 4015987 is 7895104.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (4015981) and next prime (4015993).

It is a cyclic number.

It is not a de Polignac number, because 4015987 - 2¹¹ = 4013939 is a prime.

It is a super-2 number, since 2×4015987² = 32256303168338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4015981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2007993 + 2007994.

It is an arithmetic number, because the mean of its divisors is an integer number (2007994).

Almost surely, 2^4015987 is an apocalyptic number.

4015987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4015987 is an equidigital number, since it uses as much as digits as its factorization.

4015987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 4015987 is about 2003.9927644580. The cubic root of 4015987 is about 158.9513055797.

The spelling of 4015987 in words is "four million, fifteen thousand, nine hundred eighty-seven".