1201566103 has 4 divisors (see below), whose sum is σ = 1272246480. Its totient is φ = 1130885728.

The previous prime is 1201566101. The next prime is 1201566109. The reversal of 1201566103 is 3016651021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201566103 - 2¹ = 1201566101 is a prime.

It is a super-2 number, since 2×1201566103² = 2887522199757213218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201566101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35340163 + ... + 35340196.

It is an arithmetic number, because the mean of its divisors is an integer number (318061620).

Almost surely, 2^1201566103 is an apocalyptic number.

1201566103 is a deficient number, since it is larger than the sum of its proper divisors (70680377).

1201566103 is an equidigital number, since it uses as much as digits as its factorization.

1201566103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70680376.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1201566103 is about 34663.6135306174. The cubic root of 1201566103 is about 1063.1206551017.

The spelling of 1201566103 in words is "one billion, two hundred one million, five hundred sixty-six thousand, one hundred three".