3121440142 has 32 divisors (see below), whose sum is σ = 5038124832. Its totient is φ = 1445151744.

The previous prime is 3121440131. The next prime is 3121440191. The reversal of 3121440142 is 2410441213.

It is a happy number.

3121440142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-5 number, since 5×3121440142⁵ (a number of 49 digits) contains 55555 as substring.

It is a congruent number.

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, 1157748 + ... + 1160440.

It is an arithmetic number, because the mean of its divisors is an integer number (157441401).

Almost surely, 2^3121440142 is an apocalyptic number.

3121440142 is a deficient number, since it is larger than the sum of its proper divisors (1916684690).

3121440142 is a wasteful number, since it uses less digits than its factorization.

3121440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 3121440142 is about 55869.8500266468. The cubic root of 3121440142 is about 1461.4535068152.

Adding to 3121440142 its reverse (2410441213), we get a palindrome (5531881355).

The spelling of 3121440142 in words is "three billion, one hundred twenty-one million, four hundred forty thousand, one hundred forty-two".