1161325621 has 8 divisors (see below), whose sum is σ = 1165529088. Its totient is φ = 1157130000.

The previous prime is 1161325597. The next prime is 1161325631. The reversal of 1161325621 is 1265231611.

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 1161325621 - 2⁵ = 1161325589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161325621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161325631) 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, 494911 + ... + 497251.

It is an arithmetic number, because the mean of its divisors is an integer number (145691136).

Almost surely, 2^1161325621 is an apocalyptic number.

It is an amenable number.

1161325621 is a deficient number, since it is larger than the sum of its proper divisors (4203467).

1161325621 is a wasteful number, since it uses less digits than its factorization.

1161325621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923.

The product of its digits is 2160, while the sum is 28.

The square root of 1161325621 is about 34078.2279615593. The cubic root of 1161325621 is about 1051.1176673276.

The spelling of 1161325621 in words is "one billion, one hundred sixty-one million, three hundred twenty-five thousand, six hundred twenty-one".