42961040 has 80 divisors (see below), whose sum is σ = 109278720. Its totient is φ = 15636480.

The previous prime is 42961013. The next prime is 42961043. The reversal of 42961040 is 4016924.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (42961043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41651 + ... + 42669.

It is an arithmetic number, because the mean of its divisors is an integer number (1365984).

Almost surely, 2^42961040 is an apocalyptic number.

42961040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42961040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54639360).

42961040 is an abundant number, since it is smaller than the sum of its proper divisors (66317680).

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

42961040 is a wasteful number, since it uses less digits than its factorization.

42961040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42961040 is about 6554.4671789551. The cubic root of 42961040 is about 350.2339660139.

Adding to 42961040 its reverse (4016924), we get a palindrome (46977964).

The spelling of 42961040 in words is "forty-two million, nine hundred sixty-one thousand, forty".