42405026 has 4 divisors (see below), whose sum is σ = 63607542. Its totient is φ = 21202512.

The previous prime is 42405023. The next prime is 42405049. The reversal of 42405026 is 62050424.

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

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 2399401 = 6325^2 + 1549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42404992 and 42405010.

It is not an unprimeable number, because it can be changed into a prime (42405023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601255 + ... + 10601258.

Almost surely, 2^42405026 is an apocalyptic number.

42405026 is a deficient number, since it is larger than the sum of its proper divisors (21202516).

42405026 is a wasteful number, since it uses less digits than its factorization.

42405026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21202515.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42405026 is about 6511.9141579109. The cubic root of 42405026 is about 348.7164578507.

The spelling of 42405026 in words is "forty-two million, four hundred five thousand, twenty-six".