1161672201 has 24 divisors (see below), whose sum is σ = 1752416640. Its totient is φ = 740146176.

The previous prime is 1161672139. The next prime is 1161672209. The reversal of 1161672201 is 1022761611.

It is a happy number.

It is not a de Polignac number, because 1161672201 - 2¹⁵ = 1161639433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161672209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 430665 + ... + 433353.

It is an arithmetic number, because the mean of its divisors is an integer number (73017360).

Almost surely, 2^1161672201 is an apocalyptic number.

It is an amenable number.

1161672201 is a deficient number, since it is larger than the sum of its proper divisors (590744439).

1161672201 is a wasteful number, since it uses less digits than its factorization.

1161672201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805 (or 4802 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1161672201 is about 34083.3126471005. The cubic root of 1161672201 is about 1051.2222202974. Note that the first 5 decimals are identical.

The spelling of 1161672201 in words is "one billion, one hundred sixty-one million, six hundred seventy-two thousand, two hundred one".