42120401240 has 16 divisors (see below), whose sum is σ = 94770902880. Its totient is φ = 16848160480.

The previous prime is 42120401231. The next prime is 42120401317. The reversal of 42120401240 is 4210402124.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 526504976 + ... + 526505055.

It is an arithmetic number, because the mean of its divisors is an integer number (5923181430).

Almost surely, 2^42120401240 is an apocalyptic number.

42120401240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42120401240 is an abundant number, since it is smaller than the sum of its proper divisors (52650501640).

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

42120401240 is a wasteful number, since it uses less digits than its factorization.

42120401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053010042 (or 1053010038 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 42120401240 its reverse (4210402124), we get a palindrome (46330803364).

The spelling of 42120401240 in words is "forty-two billion, one hundred twenty million, four hundred one thousand, two hundred forty".