1201353645 has 16 divisors (see below), whose sum is σ = 1923759360. Its totient is φ = 640190784.

The previous prime is 1201353599. The next prime is 1201353661. The reversal of 1201353645 is 5463531021.

It is not a de Polignac number, because 1201353645 - 2¹⁷ = 1201222573 is a prime.

It is a super-3 number, since 3×1201353645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14149 + ... + 51018.

It is an arithmetic number, because the mean of its divisors is an integer number (120234960).

Almost surely, 2^1201353645 is an apocalyptic number.

1201353645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201353645 is a deficient number, since it is larger than the sum of its proper divisors (722405715).

1201353645 is a wasteful number, since it uses less digits than its factorization.

1201353645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66404.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1201353645 is about 34660.5488271608. The cubic root of 1201353645 is about 1063.0579919375.

Adding to 1201353645 its reverse (5463531021), we get a palindrome (6664884666).

The spelling of 1201353645 in words is "one billion, two hundred one million, three hundred fifty-three thousand, six hundred forty-five".