3721023421 has 8 divisors (see below), whose sum is σ = 3940761024. Its totient is φ = 3506115360.

The previous prime is 3721023401. The next prime is 3721023431. The reversal of 3721023421 is 1243201273.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-3721023421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721023401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205800 + ... + 1208881.

It is an arithmetic number, because the mean of its divisors is an integer number (492595128).

Almost surely, 2^3721023421 is an apocalyptic number.

It is an amenable number.

3721023421 is a deficient number, since it is larger than the sum of its proper divisors (219737603).

3721023421 is a wasteful number, since it uses less digits than its factorization.

3721023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414771.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 3721023421 is about 61000.1919751078. The cubic root of 3721023421 is about 1549.6042584557.

Adding to 3721023421 its reverse (1243201273), we get a palindrome (4964224694).

The spelling of 3721023421 in words is "three billion, seven hundred twenty-one million, twenty-three thousand, four hundred twenty-one".