1140998521 has 4 divisors (see below), whose sum is σ = 1228767652. Its totient is φ = 1053229392.

The previous prime is 1140998519. The next prime is 1140998527. The reversal of 1140998521 is 1258990411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1258990411 = 7 ⋅179855773.

It can be written as a sum of positive squares in 2 ways, for example, as 51998521 + 1089000000 = 7211^2 + 33000^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140998521 - 2¹ = 1140998519 is a prime.

It is a super-3 number, since 3×1140998521³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140998527) 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, 43884546 + ... + 43884571.

It is an arithmetic number, because the mean of its divisors is an integer number (307191913).

Almost surely, 2^1140998521 is an apocalyptic number.

It is an amenable number.

1140998521 is a deficient number, since it is larger than the sum of its proper divisors (87769131).

1140998521 is an equidigital number, since it uses as much as digits as its factorization.

1140998521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87769130.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1140998521 is about 33778.6696156021. The cubic root of 1140998521 is about 1044.9488374942.

The spelling of 1140998521 in words is "one billion, one hundred forty million, nine hundred ninety-eight thousand, five hundred twenty-one".