42402042425 has 6 divisors (see below), whose sum is σ = 52578532638. Its totient is φ = 33921633920.

The previous prime is 42402042407. The next prime is 42402042433. The reversal of 42402042425 is 52424020424.

It can be written as a sum of positive squares in 3 ways, for example, as 7021937209 + 35380105216 = 83797^2 + 188096^2 .

It is not a de Polignac number, because 42402042425 - 2²⁸ = 42133606969 is a prime.

It is a super-2 number, since 2×42402042425² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 848040824 + ... + 848040873.

It is an arithmetic number, because the mean of its divisors is an integer number (8763088773).

Almost surely, 2^42402042425 is an apocalyptic number.

It is an amenable number.

42402042425 is a deficient number, since it is larger than the sum of its proper divisors (10176490213).

42402042425 is a wasteful number, since it uses less digits than its factorization.

42402042425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696081707 (or 1696081702 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 29.

Adding to 42402042425 its reverse (52424020424), we get a palindrome (94826062849).

The spelling of 42402042425 in words is "forty-two billion, four hundred two million, forty-two thousand, four hundred twenty-five".