1201044653 has 4 divisors (see below), whose sum is σ = 1228975968. Its totient is φ = 1173113340.

The previous prime is 1201044619. The next prime is 1201044661. The reversal of 1201044653 is 3564401021.

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: 3564401021 = 43 ⋅82893047.

It is a cyclic number.

It is not a de Polignac number, because 1201044653 - 2¹² = 1201040557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201044353) 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, 13965593 + ... + 13965678.

It is an arithmetic number, because the mean of its divisors is an integer number (307243992).

Almost surely, 2^1201044653 is an apocalyptic number.

It is an amenable number.

1201044653 is a deficient number, since it is larger than the sum of its proper divisors (27931315).

1201044653 is an equidigital number, since it uses as much as digits as its factorization.

1201044653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27931314.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1201044653 is about 34656.0911384997. The cubic root of 1201044653 is about 1062.9668434840.

Adding to 1201044653 its reverse (3564401021), we get a palindrome (4765445674).

The spelling of 1201044653 in words is "one billion, two hundred one million, forty-four thousand, six hundred fifty-three".