1201113646 has 4 divisors (see below), whose sum is σ = 1801670472. Its totient is φ = 600556822.

The previous prime is 1201113643. The next prime is 1201113649. The reversal of 1201113646 is 6463111021.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1201113643) and next prime (1201113649).

It is a self number, because there is not a number n which added to its sum of digits gives 1201113646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201113643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300278410 + ... + 300278413.

It is an arithmetic number, because the mean of its divisors is an integer number (450417618).

Almost surely, 2^1201113646 is an apocalyptic number.

1201113646 is a deficient number, since it is larger than the sum of its proper divisors (600556826).

1201113646 is an equidigital number, since it uses as much as digits as its factorization.

1201113646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600556825.

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

The square root of 1201113646 is about 34657.0865192099. The cubic root of 1201113646 is about 1062.9871968397.

Adding to 1201113646 its reverse (6463111021), we get a palindrome (7664224667).

The spelling of 1201113646 in words is "one billion, two hundred one million, one hundred thirteen thousand, six hundred forty-six".