6509642 has 4 divisors (see below), whose sum is σ = 9764466. Its totient is φ = 3254820.

The previous prime is 6509617. The next prime is 6509677. The reversal of 6509642 is 2469056.

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

It can be written as a sum of positive squares in only one way, i.e., 4165681 + 2343961 = 2041^2 + 1531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6509599 and 6509608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1627409 + ... + 1627412.

Almost surely, 2^6509642 is an apocalyptic number.

6509642 is a deficient number, since it is larger than the sum of its proper divisors (3254824).

6509642 is a wasteful number, since it uses less digits than its factorization.

6509642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254823.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6509642 is about 2551.4000078388. The cubic root of 6509642 is about 186.7177914104.

The spelling of 6509642 in words is "six million, five hundred nine thousand, six hundred forty-two".