1201655061 has 16 divisors (see below), whose sum is σ = 1813821120. Its totient is φ = 785987280.

The previous prime is 1201655053. The next prime is 1201655069. The reversal of 1201655061 is 1605561021.

It is a happy number.

1201655061 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 655 + 0 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1201655053) and next prime (1201655069).

It is not a de Polignac number, because 1201655061 - 2³ = 1201655053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201655069) 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, 418435 + ... + 421296.

It is an arithmetic number, because the mean of its divisors is an integer number (113363820).

Almost surely, 2^1201655061 is an apocalyptic number.

It is an amenable number.

1201655061 is a deficient number, since it is larger than the sum of its proper divisors (612166059).

1201655061 is an equidigital number, since it uses as much as digits as its factorization.

1201655061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839793 (or 839787 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1201655061 is about 34664.8966679550. The cubic root of 1201655061 is about 1063.1468905160.

The spelling of 1201655061 in words is "one billion, two hundred one million, six hundred fifty-five thousand, sixty-one".