1073565121 has 4 divisors (see below), whose sum is σ = 1091761200. Its totient is φ = 1055369044.

The previous prime is 1073565109. The next prime is 1073565127. The reversal of 1073565121 is 1215653701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1215653701 = 4153 ⋅292717.

It is a cyclic number.

It is not a de Polignac number, because 1073565121 - 2⁷ = 1073564993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1073565127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9097951 + ... + 9098068.

It is an arithmetic number, because the mean of its divisors is an integer number (272940300).

Almost surely, 2^1073565121 is an apocalyptic number.

It is an amenable number.

1073565121 is a deficient number, since it is larger than the sum of its proper divisors (18196079).

1073565121 is an equidigital number, since it uses as much as digits as its factorization.

1073565121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18196078.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 1073565121 is about 32765.3036152574. The cubic root of 1073565121 is about 1023.9438245474.

The spelling of 1073565121 in words is "one billion, seventy-three million, five hundred sixty-five thousand, one hundred twenty-one".