3987457 has 4 divisors (see below), whose sum is σ = 4014016. Its totient is φ = 3960900.

The previous prime is 3987449. The next prime is 3987481. The reversal of 3987457 is 7547893.

It is a happy number.

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 3987457 - 2³ = 3987449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987407) 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, 13053 + ... + 13354.

It is an arithmetic number, because the mean of its divisors is an integer number (1003504).

It is a Proth number, since it is equal to 1947 ⋅ 2¹¹ + 1 and 1947 < 2¹¹.

Almost surely, 2^3987457 is an apocalyptic number.

It is an amenable number.

3987457 is a deficient number, since it is larger than the sum of its proper divisors (26559).

3987457 is a wasteful number, since it uses less digits than its factorization.

3987457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26558.

The product of its digits is 211680, while the sum is 43.

The square root of 3987457 is about 1996.8617879062. The cubic root of 3987457 is about 158.5740083680.

It can be divided in two parts, 3987 and 457, that added together give a palindrome (4444).

The spelling of 3987457 in words is "three million, nine hundred eighty-seven thousand, four hundred fifty-seven".