1135565421 has 8 divisors (see below), whose sum is σ = 1528787520. Its totient is φ = 749693472.

The previous prime is 1135565411. The next prime is 1135565423. The reversal of 1135565421 is 1245655311.

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

It is not a de Polignac number, because 1135565421 - 2¹³ = 1135557229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135565423) 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, 1837176 + ... + 1837793.

It is an arithmetic number, because the mean of its divisors is an integer number (191098440).

Almost surely, 2^1135565421 is an apocalyptic number.

It is an amenable number.

1135565421 is a deficient number, since it is larger than the sum of its proper divisors (393222099).

1135565421 is a wasteful number, since it uses less digits than its factorization.

1135565421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675075.

The product of its digits is 18000, while the sum is 33.

The square root of 1135565421 is about 33698.1515961929. The cubic root of 1135565421 is about 1043.2876180831.

The spelling of 1135565421 in words is "one billion, one hundred thirty-five million, five hundred sixty-five thousand, four hundred twenty-one".