1601207149 has 4 divisors (see below), whose sum is σ = 1601523036. Its totient is φ = 1600891264.

The previous prime is 1601207147. The next prime is 1601207173. The reversal of 1601207149 is 9417021061.

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 1396516900 + 204690249 = 37370^2 + 14307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601207149 - 2¹ = 1601207147 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 a self number, because there is not a number n which added to its sum of digits gives 1601207149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601207141) 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, 150214 + ... + 160519.

It is an arithmetic number, because the mean of its divisors is an integer number (400380759).

Almost surely, 2^1601207149 is an apocalyptic number.

It is an amenable number.

1601207149 is a deficient number, since it is larger than the sum of its proper divisors (315887).

1601207149 is an equidigital number, since it uses as much as digits as its factorization.

1601207149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315886.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1601207149 is about 40015.0865174624. The cubic root of 1601207149 is about 1169.9011650995.

The spelling of 1601207149 in words is "one billion, six hundred one million, two hundred seven thousand, one hundred forty-nine".