6402487 has 36 divisors (see below), whose sum is σ = 8825880. Its totient is φ = 4590432.

The previous prime is 6402457. The next prime is 6402493. The reversal of 6402487 is 7842046.

It is a de Polignac number, because none of the positive numbers 2^k-6402487 is a prime.

6402487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 278358 + ... + 278380.

Almost surely, 2^6402487 is an apocalyptic number.

6402487 is a deficient number, since it is larger than the sum of its proper divisors (2423393).

6402487 is a wasteful number, since it uses less digits than its factorization.

6402487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 6402487 is about 2530.3136169258. The cubic root of 6402487 is about 185.6875994622.

It can be divided in two parts, 6402 and 487, that added together give a square (6889 = 83²).

The spelling of 6402487 in words is "six million, four hundred two thousand, four hundred eighty-seven".