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42000052 = 2210500013
BaseRepresentation
bin1010000000110…
…1111010110100
32221000211020111
42200031322310
541223000202
64100112404
71016665063
oct240157264
987024214
1042000052
1121787296
1212095704
138917003
1458141da
153a496d7
hex280deb4

42000052 has 6 divisors (see below), whose sum is σ = 73500098. Its totient is φ = 21000024.

The previous prime is 42000037. The next prime is 42000059. The reversal of 42000052 is 25000024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24661156 + 17338896 = 4966^2 + 4164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 41999996 and 42000041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42000059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250003 + ... + 5250010.

Almost surely, 242000052 is an apocalyptic number.

It is an amenable number.

42000052 is a deficient number, since it is larger than the sum of its proper divisors (31500046).

42000052 is a wasteful number, since it uses less digits than its factorization.

42000052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500017 (or 10500015 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 42000052 is about 6480.7447102937. The cubic root of 42000052 is about 347.6028079437.

Adding to 42000052 its reverse (25000024), we get a palindrome (67000076).

The spelling of 42000052 in words is "forty-two million, fifty-two", and thus it is an aban number, an eban number, and an uban number.

Divisors: 1 2 4 10500013 21000026 42000052