1201553063 has 4 divisors (see below), whose sum is σ = 1218012768. Its totient is φ = 1185093360.

The previous prime is 1201553057. The next prime is 1201553077. The reversal of 1201553063 is 3603551021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201553063 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 (1201553053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8229743 + ... + 8229888.

It is an arithmetic number, because the mean of its divisors is an integer number (304503192).

Almost surely, 2^1201553063 is an apocalyptic number.

1201553063 is a deficient number, since it is larger than the sum of its proper divisors (16459705).

1201553063 is an equidigital number, since it uses as much as digits as its factorization.

1201553063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16459704.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1201553063 is about 34663.4254366183. The cubic root of 1201553063 is about 1063.1168092477.

The spelling of 1201553063 in words is "one billion, two hundred one million, five hundred fifty-three thousand, sixty-three".