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542665021 = 10143912239
BaseRepresentation
bin100000010110000…
…110100100111101
31101211010020110111
4200112012210331
52102410240041
6125503110021
716306401523
oct4026064475
91354106414
10542665021
11259358298
121318a2311
1388572982
1452100313
1532994981
hex2058693d

542665021 has 8 divisors (see below), whose sum is σ = 549331200. Its totient is φ = 536024400.

The previous prime is 542665001. The next prime is 542665033. The reversal of 542665021 is 120566245.

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 542665021 - 25 = 542664989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542665001) 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 7 ways as a sum of consecutive naturals, for example, 38220 + ... + 50458.

It is an arithmetic number, because the mean of its divisors is an integer number (68666400).

Almost surely, 2542665021 is an apocalyptic number.

It is an amenable number.

542665021 is a deficient number, since it is larger than the sum of its proper divisors (6666179).

542665021 is a wasteful number, since it uses less digits than its factorization.

542665021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12779.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 542665021 is about 23295.1716241800. The cubic root of 542665021 is about 815.6627131331.

The spelling of 542665021 in words is "five hundred forty-two million, six hundred sixty-five thousand, twenty-one".

Divisors: 1 101 439 12239 44339 1236139 5372921 542665021