4121243990 has 32 divisors (see below), whose sum is σ = 7535462400. Its totient is φ = 1622527200.

The previous prime is 4121243957. The next prime is 4121243999. The reversal of 4121243990 is 993421214.

It is a super-2 number, since 2×4121243990² = 33969304050222240200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4121243990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121243999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443411 + ... + 452609.

It is an arithmetic number, because the mean of its divisors is an integer number (235483200).

Almost surely, 2^4121243990 is an apocalyptic number.

4121243990 is a deficient number, since it is larger than the sum of its proper divisors (3414218410).

4121243990 is a wasteful number, since it uses less digits than its factorization.

4121243990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9908.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 4121243990 is about 64196.9157358825. The cubic root of 4121243990 is about 1603.2802482509.

The spelling of 4121243990 in words is "four billion, one hundred twenty-one million, two hundred forty-three thousand, nine hundred ninety".