42154440 has 32 divisors (see below), whose sum is σ = 126463680. Its totient is φ = 11241152.

The previous prime is 42154439. The next prime is 42154459. The reversal of 42154440 is 4445124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 42154440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175524 + ... + 175763.

It is an arithmetic number, because the mean of its divisors is an integer number (3951990).

Almost surely, 2^42154440 is an apocalyptic number.

42154440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42154440 is an abundant number, since it is smaller than the sum of its proper divisors (84309240).

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

42154440 is a wasteful number, since it uses less digits than its factorization.

42154440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351301 (or 351297 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 42154440 is about 6492.6450696153. The cubic root of 42154440 is about 348.0282048748.

Adding to 42154440 its reverse (4445124), we get a palindrome (46599564).

The spelling of 42154440 in words is "forty-two million, one hundred fifty-four thousand, four hundred forty".