1201617605 has 16 divisors (see below), whose sum is σ = 1454785920. Its totient is φ = 952765632.

The previous prime is 1201617601. The next prime is 1201617617. The reversal of 1201617605 is 5067161021.

It is a cyclic number.

It is not a de Polignac number, because 1201617605 - 2² = 1201617601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201617601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314567 + ... + 318363.

It is an arithmetic number, because the mean of its divisors is an integer number (90924120).

Almost surely, 2^1201617605 is an apocalyptic number.

It is an amenable number.

1201617605 is a deficient number, since it is larger than the sum of its proper divisors (253168315).

1201617605 is a wasteful number, since it uses less digits than its factorization.

1201617605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1201617605 is about 34664.3564053914. The cubic root of 1201617605 is about 1063.1358441836.

Adding to 1201617605 its reverse (5067161021), we get a palindrome (6268778626).

The spelling of 1201617605 in words is "one billion, two hundred one million, six hundred seventeen thousand, six hundred five".