1201361641 has 4 divisors (see below), whose sum is σ = 1201657984. Its totient is φ = 1201065300.

The previous prime is 1201361639. The next prime is 1201361669. The reversal of 1201361641 is 1461631021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1461631021 = 107 ⋅13660103.

It is a cyclic number.

It is not a de Polignac number, because 1201361641 - 2¹ = 1201361639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201361041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142005 + ... + 150226.

It is an arithmetic number, because the mean of its divisors is an integer number (300414496).

Almost surely, 2^1201361641 is an apocalyptic number.

It is an amenable number.

1201361641 is a deficient number, since it is larger than the sum of its proper divisors (296343).

1201361641 is an equidigital number, since it uses as much as digits as its factorization.

1201361641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296342.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1201361641 is about 34660.6641742480. The cubic root of 1201361641 is about 1063.0603504417.

Adding to 1201361641 its reverse (1461631021), we get a palindrome (2662992662).

The spelling of 1201361641 in words is "one billion, two hundred one million, three hundred sixty-one thousand, six hundred forty-one".