7251987 has 16 divisors (see below), whose sum is σ = 9897120. Its totient is φ = 4722432.

The previous prime is 7251983. The next prime is 7251989. The reversal of 7251987 is 7891527.

It is not a de Polignac number, because 7251987 - 2² = 7251983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7251983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41833 + ... + 42005.

It is an arithmetic number, because the mean of its divisors is an integer number (618570).

Almost surely, 2^7251987 is an apocalyptic number.

7251987 is a deficient number, since it is larger than the sum of its proper divisors (2645133).

7251987 is a wasteful number, since it uses less digits than its factorization.

7251987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its digits is 35280, while the sum is 39.

The square root of 7251987 is about 2692.9513549264. The cubic root of 7251987 is about 193.5615118689.

The spelling of 7251987 in words is "seven million, two hundred fifty-one thousand, nine hundred eighty-seven".