642020419 has 8 divisors (see below), whose sum is σ = 680611680. Its totient is φ = 603520896.

The previous prime is 642020387. The next prime is 642020443. The reversal of 642020419 is 914020246.

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 642020419 - 2⁵ = 642020387 is a prime.

It is a super-2 number, since 2×642020419² = 824380436825871122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642020719) 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, 8244 + ... + 36769.

It is an arithmetic number, because the mean of its divisors is an integer number (85076460).

Almost surely, 2^642020419 is an apocalyptic number.

642020419 is a deficient number, since it is larger than the sum of its proper divisors (38591261).

642020419 is a wasteful number, since it uses less digits than its factorization.

642020419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45869.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 642020419 is about 25338.1218522605. The cubic root of 642020419 is about 862.6797694037.

The spelling of 642020419 in words is "six hundred forty-two million, twenty thousand, four hundred nineteen".