4051987 has 2 divisors, whose sum is σ = 4051988. Its totient is φ = 4051986.

The previous prime is 4051951. The next prime is 4051991. The reversal of 4051987 is 7891504.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4051987 - 2¹⁵ = 4019219 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4054987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2025993 + 2025994.

It is an arithmetic number, because the mean of its divisors is an integer number (2025994).

Almost surely, 2^4051987 is an apocalyptic number.

4051987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4051987 is an equidigital number, since it uses as much as digits as its factorization.

4051987 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 4051987 is about 2012.9547933324. The cubic root of 4051987 is about 159.4248490485.

The spelling of 4051987 in words is "four million, fifty-one thousand, nine hundred eighty-seven".