1601251345 has 4 divisors (see below), whose sum is σ = 1921501620. Its totient is φ = 1281001072.

The previous prime is 1601251343. The next prime is 1601251349. The reversal of 1601251345 is 5431521061.

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 879952896 + 721298449 = 29664^2 + 26857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601251345 - 2¹ = 1601251343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601251343) 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, 160125130 + ... + 160125139.

It is an arithmetic number, because the mean of its divisors is an integer number (480375405).

Almost surely, 2^1601251345 is an apocalyptic number.

It is an amenable number.

1601251345 is a deficient number, since it is larger than the sum of its proper divisors (320250275).

1601251345 is an equidigital number, since it uses as much as digits as its factorization.

1601251345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320250274.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1601251345 is about 40015.6387553666. The cubic root of 1601251345 is about 1169.9119287445.

The spelling of 1601251345 in words is "one billion, six hundred one million, two hundred fifty-one thousand, three hundred forty-five".