4587981 has 4 divisors (see below), whose sum is σ = 6117312. Its totient is φ = 3058652.

The previous prime is 4587967. The next prime is 4587997. The reversal of 4587981 is 1897854.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4587981 - 2⁷ = 4587853 is a prime.

It is a super-2 number, since 2×4587981² = 42099139312722, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4587901) 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, 764661 + ... + 764666.

It is an arithmetic number, because the mean of its divisors is an integer number (1529328).

Almost surely, 2^4587981 is an apocalyptic number.

It is an amenable number.

4587981 is a deficient number, since it is larger than the sum of its proper divisors (1529331).

4587981 is a wasteful number, since it uses less digits than its factorization.

4587981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529330.

The product of its digits is 80640, while the sum is 42.

The square root of 4587981 is about 2141.9572824872. The cubic root of 4587981 is about 166.1653768740.

The spelling of 4587981 in words is "four million, five hundred eighty-seven thousand, nine hundred eighty-one".