7421102138 has 8 divisors (see below), whose sum is σ = 11136888180. Its totient is φ = 3708806080.

The previous prime is 7421102113. The next prime is 7421102167. The reversal of 7421102138 is 8312011247.

It can be written as a sum of positive squares in 2 ways, for example, as 7128931489 + 292170649 = 84433^2 + 17093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7421102138.

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, 867173 + ... + 875688.

Almost surely, 2^7421102138 is an apocalyptic number.

7421102138 is a deficient number, since it is larger than the sum of its proper divisors (3715786042).

7421102138 is a wasteful number, since it uses less digits than its factorization.

7421102138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744992.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 7421102138 is about 86145.8190395796. The cubic root of 7421102138 is about 1950.5457283010.

The spelling of 7421102138 in words is "seven billion, four hundred twenty-one million, one hundred two thousand, one hundred thirty-eight".