1601211386 has 4 divisors (see below), whose sum is σ = 2401817082. Its totient is φ = 800605692.

The previous prime is 1601211373. The next prime is 1601211389. The reversal of 1601211386 is 6831121061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6831121061 = 1201 ⋅5687861.

It can be written as a sum of positive squares in only one way, i.e., 1376781025 + 224430361 = 37105^2 + 14981^2 .

It is not an unprimeable number, because it can be changed into a prime (1601211389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400302845 + ... + 400302848.

Almost surely, 2^1601211386 is an apocalyptic number.

1601211386 is a deficient number, since it is larger than the sum of its proper divisors (800605696).

1601211386 is an equidigital number, since it uses as much as digits as its factorization.

1601211386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800605695.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1601211386 is about 40015.1394599594. The cubic root of 1601211386 is about 1169.9021970016.

The spelling of 1601211386 in words is "one billion, six hundred one million, two hundred eleven thousand, three hundred eighty-six".