7821425042 has 32 divisors (see below), whose sum is σ = 12778083072. Its totient is φ = 3575556864.

The previous prime is 7821425039. The next prime is 7821425111. The reversal of 7821425042 is 2405241287.

It is a super-2 number, since 2×7821425042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7821424993 and 7821425011.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854663 + ... + 863765.

It is an arithmetic number, because the mean of its divisors is an integer number (399315096).

Almost surely, 2^7821425042 is an apocalyptic number.

7821425042 is a deficient number, since it is larger than the sum of its proper divisors (4956658030).

7821425042 is a wasteful number, since it uses less digits than its factorization.

7821425042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9842.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 7821425042 is about 88438.8208989695. The cubic root of 7821425042 is about 1985.0066338630.

The spelling of 7821425042 in words is "seven billion, eight hundred twenty-one million, four hundred twenty-five thousand, forty-two".