3781264521 has 8 divisors (see below), whose sum is σ = 5041970944. Its totient is φ = 2520700560.

The previous prime is 3781264519. The next prime is 3781264541. The reversal of 3781264521 is 1254621873.

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

It is not a de Polignac number, because 3781264521 - 2¹ = 3781264519 is a prime.

It is a super-2 number, since 2×3781264521² = 28595922755546718882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3781264521.

It is not an unprimeable number, because it can be changed into a prime (3781264541) 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, 79176 + ... + 117606.

It is an arithmetic number, because the mean of its divisors is an integer number (630246368).

Almost surely, 2^3781264521 is an apocalyptic number.

It is an amenable number.

3781264521 is a deficient number, since it is larger than the sum of its proper divisors (1260706423).

3781264521 is a wasteful number, since it uses less digits than its factorization.

3781264521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71231.

The product of its digits is 80640, while the sum is 39.

The square root of 3781264521 is about 61491.9874536512. The cubic root of 3781264521 is about 1557.9219153647.

The spelling of 3781264521 in words is "three billion, seven hundred eighty-one million, two hundred sixty-four thousand, five hundred twenty-one".