1161440621 has 8 divisors (see below), whose sum is σ = 1296492384. Its totient is φ = 1031299920.

The previous prime is 1161440617. The next prime is 1161440639. The reversal of 1161440621 is 1260441611.

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 1161440621 - 2² = 1161440617 is a prime.

It is a super-2 number, since 2×1161440621² = 2697888632217731282, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161440521) 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, 1227266 + ... + 1228211.

It is an arithmetic number, because the mean of its divisors is an integer number (162061548).

Almost surely, 2^1161440621 is an apocalyptic number.

1161440621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1161440621 is a deficient number, since it is larger than the sum of its proper divisors (135051763).

1161440621 is a wasteful number, since it uses less digits than its factorization.

1161440621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455531.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1161440621 is about 34079.9152140964. The cubic root of 1161440621 is about 1051.1523617434.

The spelling of 1161440621 in words is "one billion, one hundred sixty-one million, four hundred forty thousand, six hundred twenty-one".