42312503 has 4 divisors (see below), whose sum is σ = 42723408. Its totient is φ = 41901600.

The previous prime is 42312493. The next prime is 42312509. The reversal of 42312503 is 30521324.

It is a happy number.

42312503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42312503 - 2¹² = 42308407 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 (42312509) 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 3 ways as a sum of consecutive naturals, for example, 205298 + ... + 205503.

It is an arithmetic number, because the mean of its divisors is an integer number (10680852).

Almost surely, 2^42312503 is an apocalyptic number.

42312503 is a deficient number, since it is larger than the sum of its proper divisors (410905).

42312503 is a wasteful number, since it uses less digits than its factorization.

42312503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410904.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42312503 is about 6504.8061462276. The cubic root of 42312503 is about 348.4626531327.

Adding to 42312503 its reverse (30521324), we get a palindrome (72833827).

It can be divided in two parts, 42 and 312503, that multiplied together give a triangular number (13125126 = T₅₁₂₃).

The spelling of 42312503 in words is "forty-two million, three hundred twelve thousand, five hundred three".