42405501 has 8 divisors (see below), whose sum is σ = 56635360. Its totient is φ = 28222992.

The previous prime is 42405499. The next prime is 42405509. The reversal of 42405501 is 10550424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42405501 - 2¹ = 42405499 is a prime.

It is a super-2 number, since 2×42405501² = 3596453030122002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9691 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (7079420).

Almost surely, 2^42405501 is an apocalyptic number.

It is an amenable number.

42405501 is a deficient number, since it is larger than the sum of its proper divisors (14229859).

42405501 is a wasteful number, since it uses less digits than its factorization.

42405501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23675.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42405501 is about 6511.9506294197. The cubic root of 42405501 is about 348.7177598953.

Adding to 42405501 its reverse (10550424), we get a palindrome (52955925).

The spelling of 42405501 in words is "forty-two million, four hundred five thousand, five hundred one".