42087917125 has 8 divisors (see below), whose sum is σ = 52525720728. Its totient is φ = 33670333600.

The previous prime is 42087917077. The next prime is 42087917173. The reversal of 42087917125 is 52171978024.

It is an interprime number because it is at equal distance from previous prime (42087917077) and next prime (42087917173).

It can be written as a sum of positive squares in 4 ways, for example, as 10198172196 + 31889744929 = 100986^2 + 178577^2 .

It is not a de Polignac number, because 42087917125 - 2¹⁵ = 42087884357 is a prime.

It is a super-5 number, since 5×42087917125⁵ (a number of 54 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168351544 + ... + 168351793.

It is an arithmetic number, because the mean of its divisors is an integer number (6565715091).

Almost surely, 2^42087917125 is an apocalyptic number.

It is an amenable number.

42087917125 is a deficient number, since it is larger than the sum of its proper divisors (10437803603).

42087917125 is an equidigital number, since it uses as much as digits as its factorization.

42087917125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336703352 (or 336703342 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 42087917125 in words is "forty-two billion, eighty-seven million, nine hundred seventeen thousand, one hundred twenty-five".