3757072121 has 4 divisors (see below), whose sum is σ = 4098624144. Its totient is φ = 3415520100.

The previous prime is 3757072117. The next prime is 3757072129. The reversal of 3757072121 is 1212707573.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3757072121 - 2² = 3757072117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3757072129) 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, 170775995 + ... + 170776016.

It is an arithmetic number, because the mean of its divisors is an integer number (1024656036).

Almost surely, 2^3757072121 is an apocalyptic number.

It is an amenable number.

3757072121 is a deficient number, since it is larger than the sum of its proper divisors (341552023).

3757072121 is a wasteful number, since it uses less digits than its factorization.

3757072121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341552022.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 3757072121 is about 61294.9599967240. The cubic root of 3757072121 is about 1554.5922940736.

Adding to 3757072121 its reverse (1212707573), we get a palindrome (4969779694).

The spelling of 3757072121 in words is "three billion, seven hundred fifty-seven million, seventy-two thousand, one hundred twenty-one".