1131621073 has 8 divisors (see below), whose sum is σ = 1257788736. Its totient is φ = 1009335600.

The previous prime is 1131621059. The next prime is 1131621079. The reversal of 1131621073 is 3701261311.

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 1131621073 - 2²¹ = 1129523921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131621079) 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, 969933 + ... + 971098.

It is an arithmetic number, because the mean of its divisors is an integer number (157223592).

Almost surely, 2^1131621073 is an apocalyptic number.

It is an amenable number.

1131621073 is a deficient number, since it is larger than the sum of its proper divisors (126167663).

1131621073 is a wasteful number, since it uses less digits than its factorization.

1131621073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941095.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1131621073 is about 33639.5759931661. The cubic root of 1131621073 is about 1042.0782754037.

Adding to 1131621073 its reverse (3701261311), we get a palindrome (4832882384).

The spelling of 1131621073 in words is "one billion, one hundred thirty-one million, six hundred twenty-one thousand, seventy-three".