4251487 has 4 divisors (see below), whose sum is σ = 4398120. Its totient is φ = 4104856.

The previous prime is 4251463. The next prime is 4251491. The reversal of 4251487 is 7841524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4251487 is a prime.

It is a super-2 number, since 2×4251487² = 36150283422338, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251407) 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, 73273 + ... + 73330.

It is an arithmetic number, because the mean of its divisors is an integer number (1099530).

Almost surely, 2^4251487 is an apocalyptic number.

4251487 is a deficient number, since it is larger than the sum of its proper divisors (146633).

4251487 is a wasteful number, since it uses less digits than its factorization.

4251487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146632.

The product of its digits is 8960, while the sum is 31.

The square root of 4251487 is about 2061.9134317425. The cubic root of 4251487 is about 161.9994792444. Note that the first 3 decimals are identical.

It can be divided in two parts, 42 and 51487, that added together give a square (51529 = 227²).

The spelling of 4251487 in words is "four million, two hundred fifty-one thousand, four hundred eighty-seven".