42261040 has 20 divisors (see below), whose sum is σ = 98257104. Its totient is φ = 16904384.

The previous prime is 42261013. The next prime is 42261049. The reversal of 42261040 is 4016224.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 42260999 and 42261017.

It is not an unprimeable number, because it can be changed into a prime (42261049) 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, 264052 + ... + 264211.

Almost surely, 2^42261040 is an apocalyptic number.

42261040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42261040 is an abundant number, since it is smaller than the sum of its proper divisors (55996064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42261040 is a wasteful number, since it uses less digits than its factorization.

42261040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528276 (or 528270 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42261040 is about 6500.8491753001. The cubic root of 42261040 is about 348.3213221034.

Adding to 42261040 its reverse (4016224), we get a palindrome (46277264).

The spelling of 42261040 in words is "forty-two million, two hundred sixty-one thousand, forty".