3720154121 has 4 divisors (see below), whose sum is σ = 3731193492. Its totient is φ = 3709114752.

The previous prime is 3720154037. The next prime is 3720154129. The reversal of 3720154121 is 1214510273.

3720154121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1214510273 = 67 ⋅18127019.

It can be written as a sum of positive squares in 2 ways, for example, as 2256250000 + 1463904121 = 47500^2 + 38261^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720154121 - 2²⁶ = 3653045257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3720154129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5519180 + ... + 5519853.

It is an arithmetic number, because the mean of its divisors is an integer number (932798373).

Almost surely, 2^3720154121 is an apocalyptic number.

It is an amenable number.

3720154121 is a deficient number, since it is larger than the sum of its proper divisors (11039371).

3720154121 is a wasteful number, since it uses less digits than its factorization.

3720154121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11039370.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 3720154121 is about 60993.0661714920. The cubic root of 3720154121 is about 1549.4835769707.

Adding to 3720154121 its reverse (1214510273), we get a palindrome (4934664394).

The spelling of 3720154121 in words is "three billion, seven hundred twenty million, one hundred fifty-four thousand, one hundred twenty-one".