42641240 has 16 divisors (see below), whose sum is σ = 95942880. Its totient is φ = 17056480.

The previous prime is 42641239. The next prime is 42641327. The reversal of 42641240 is 4214624.

42641240 = 1625² + 1626² + ... + 1640².

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532976 + ... + 533055.

It is an arithmetic number, because the mean of its divisors is an integer number (5996430).

Almost surely, 2^42641240 is an apocalyptic number.

42641240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42641240 is an abundant number, since it is smaller than the sum of its proper divisors (53301640).

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

42641240 is a wasteful number, since it uses less digits than its factorization.

42641240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066042 (or 1066038 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 42641240 is about 6530.0260336388. The cubic root of 42641240 is about 349.3627588535.

Adding to 42641240 its reverse (4214624), we get a palindrome (46855864).

The spelling of 42641240 in words is "forty-two million, six hundred forty-one thousand, two hundred forty".