149472161 has 2 divisors, whose sum is σ = 149472162. Its totient is φ = 149472160.

The previous prime is 149472151. The next prime is 149472227. The reversal of 149472161 is 161274941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88943761 + 60528400 = 9431^2 + 7780^2 .

It is a cyclic number.

It is not a de Polignac number, because 149472161 - 2¹⁴ = 149455777 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (149472151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74736080 + 74736081.

It is an arithmetic number, because the mean of its divisors is an integer number (74736081).

Almost surely, 2^149472161 is an apocalyptic number.

It is an amenable number.

149472161 is a deficient number, since it is larger than the sum of its proper divisors (1).

149472161 is an equidigital number, since it uses as much as digits as its factorization.

149472161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 149472161 is about 12225.8807862665. The cubic root of 149472161 is about 530.7053158551.

The spelling of 149472161 in words is "one hundred forty-nine million, four hundred seventy-two thousand, one hundred sixty-one".