1115671621 has 16 divisors (see below), whose sum is σ = 1186056000. Its totient is φ = 1046504448.

The previous prime is 1115671607. The next prime is 1115671681. The reversal of 1115671621 is 1261765111.

It is a cyclic number.

It is not a de Polignac number, because 1115671621 - 2¹³ = 1115663429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115671681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1633146 + ... + 1633828.

It is an arithmetic number, because the mean of its divisors is an integer number (74128500).

Almost surely, 2^1115671621 is an apocalyptic number.

It is an amenable number.

1115671621 is a deficient number, since it is larger than the sum of its proper divisors (70384379).

1115671621 is a wasteful number, since it uses less digits than its factorization.

1115671621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its digits is 2520, while the sum is 31.

The square root of 1115671621 is about 33401.6709312573. The cubic root of 1115671621 is about 1037.1592907671.

The spelling of 1115671621 in words is "one billion, one hundred fifteen million, six hundred seventy-one thousand, six hundred twenty-one".