4151987 has 4 divisors (see below), whose sum is σ = 4745136. Its totient is φ = 3558840.

The previous prime is 4151977. The next prime is 4151989. The reversal of 4151987 is 7891514.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7891514 = 2 ⋅3945757.

It is a cyclic number.

It is not a de Polignac number, because 4151987 - 2⁴ = 4151971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4151989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296564 + ... + 296577.

It is an arithmetic number, because the mean of its divisors is an integer number (1186284).

Almost surely, 2^4151987 is an apocalyptic number.

4151987 is a deficient number, since it is larger than the sum of its proper divisors (593149).

4151987 is an equidigital number, since it uses as much as digits as its factorization.

4151987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593148.

The product of its digits is 10080, while the sum is 35.

The square root of 4151987 is about 2037.6425103536. The cubic root of 4151987 is about 160.7257009082.

The spelling of 4151987 in words is "four million, one hundred fifty-one thousand, nine hundred eighty-seven".