1113162521 has 4 divisors (see below), whose sum is σ = 1113304500. Its totient is φ = 1113020544.

The previous prime is 1113162503. The next prime is 1113162527. The reversal of 1113162521 is 1252613111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37650496 + 1075512025 = 6136^2 + 32795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113162521 - 2¹⁴ = 1113146137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113162527) 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, 58496 + ... + 75153.

It is an arithmetic number, because the mean of its divisors is an integer number (278326125).

Almost surely, 2^1113162521 is an apocalyptic number.

It is an amenable number.

1113162521 is a deficient number, since it is larger than the sum of its proper divisors (141979).

1113162521 is an equidigital number, since it uses as much as digits as its factorization.

1113162521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141978.

The product of its digits is 360, while the sum is 23.

The square root of 1113162521 is about 33364.0902918092. The cubic root of 1113162521 is about 1036.3811975188.

Adding to 1113162521 its reverse (1252613111), we get a palindrome (2365775632).

The spelling of 1113162521 in words is "one billion, one hundred thirteen million, one hundred sixty-two thousand, five hundred twenty-one".