1451671161 has 4 divisors (see below), whose sum is σ = 1935561552. Its totient is φ = 967780772.

The previous prime is 1451671159. The next prime is 1451671201. The reversal of 1451671161 is 1611761541.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1451671161 - 2¹ = 1451671159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1451671121) 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, 241945191 + ... + 241945196.

It is an arithmetic number, because the mean of its divisors is an integer number (483890388).

Almost surely, 2^1451671161 is an apocalyptic number.

It is an amenable number.

1451671161 is a deficient number, since it is larger than the sum of its proper divisors (483890391).

1451671161 is an equidigital number, since it uses as much as digits as its factorization.

1451671161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483890390.

The product of its digits is 5040, while the sum is 33.

The square root of 1451671161 is about 38100.8026293410. The cubic root of 1451671161 is about 1132.2858578876.

The spelling of 1451671161 in words is "one billion, four hundred fifty-one million, six hundred seventy-one thousand, one hundred sixty-one".