1504661161 has 4 divisors (see below), whose sum is σ = 1505131524. Its totient is φ = 1504190800.

The previous prime is 1504661131. The next prime is 1504661261. The reversal of 1504661161 is 1611664051.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1230957225 + 273703936 = 35085^2 + 16544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1504661161 - 2⁷ = 1504661033 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1504661131) 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, 230350 + ... + 236791.

It is an arithmetic number, because the mean of its divisors is an integer number (376282881).

Almost surely, 2^1504661161 is an apocalyptic number.

It is an amenable number.

1504661161 is a deficient number, since it is larger than the sum of its proper divisors (470363).

1504661161 is an equidigital number, since it uses as much as digits as its factorization.

1504661161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470362.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1504661161 is about 38789.9621165064. The cubic root of 1504661161 is about 1145.8987270239.

The spelling of 1504661161 in words is "one billion, five hundred four million, six hundred sixty-one thousand, one hundred sixty-one".