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42403387 = 133261799
BaseRepresentation
bin1010000111000…
…0011000111011
32221210022111211
42201300120323
541323402022
64112503551
71023265015
oct241603073
987708454
1042403387
1121a32324
121224abb7
138a28780
1458bb1b5
153ac8e77
hex287063b

42403387 has 4 divisors (see below), whose sum is σ = 45665200. Its totient is φ = 39141576.

The previous prime is 42403379. The next prime is 42403399. The reversal of 42403387 is 78330424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42403387 - 23 = 42403379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42403327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630887 + ... + 1630912.

It is an arithmetic number, because the mean of its divisors is an integer number (11416300).

Almost surely, 242403387 is an apocalyptic number.

42403387 is a deficient number, since it is larger than the sum of its proper divisors (3261813).

42403387 is a wasteful number, since it uses less digits than its factorization.

42403387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261812.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 42403387 is about 6511.7883104413. The cubic root of 42403387 is about 348.7119650371.

The spelling of 42403387 in words is "forty-two million, four hundred three thousand, three hundred eighty-seven".

Divisors: 1 13 3261799 42403387