642498467 has 8 divisors (see below), whose sum is σ = 714241920. Its totient is φ = 573943680.

The previous prime is 642498431. The next prime is 642498469. The reversal of 642498467 is 764894246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642498467 - 2⁶ = 642498403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642498469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796742 + ... + 797547.

It is an arithmetic number, because the mean of its divisors is an integer number (89280240).

Almost surely, 2^642498467 is an apocalyptic number.

642498467 is a deficient number, since it is larger than the sum of its proper divisors (71743453).

642498467 is a wasteful number, since it uses less digits than its factorization.

642498467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594333.

The product of its digits is 2322432, while the sum is 50.

The square root of 642498467 is about 25347.5534716864. The cubic root of 642498467 is about 862.8938332197.

The spelling of 642498467 in words is "six hundred forty-two million, four hundred ninety-eight thousand, four hundred sixty-seven".