1135620881 has 8 divisors (see below), whose sum is σ = 1142469504. Its totient is φ = 1128783600.

The previous prime is 1135620839. The next prime is 1135620887. The reversal of 1135620881 is 1880265311.

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

It is a cyclic number.

It is not a de Polignac number, because 1135620881 - 2⁶ = 1135620817 is a prime.

It is a super-2 number, since 2×1135620881² = 2579269570726432322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1135620887) 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, 278306 + ... + 282356.

It is an arithmetic number, because the mean of its divisors is an integer number (142808688).

Almost surely, 2^1135620881 is an apocalyptic number.

It is an amenable number.

1135620881 is a deficient number, since it is larger than the sum of its proper divisors (6848623).

1135620881 is a wasteful number, since it uses less digits than its factorization.

1135620881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1135620881 is about 33698.9744799452. The cubic root of 1135620881 is about 1043.3046022182.

The spelling of 1135620881 in words is "one billion, one hundred thirty-five million, six hundred twenty thousand, eight hundred eighty-one".