1205501481 has 16 divisors (see below), whose sum is σ = 1789078720. Its totient is φ = 802249920.

The previous prime is 1205501471. The next prime is 1205501489. The reversal of 1205501481 is 1841055021.

1205501481 is a `hidden beast` number, since 1 + 20 + 550 + 14 + 81 = 666.

It is not a de Polignac number, because 1205501481 - 2⁹ = 1205500969 is a prime.

It is a super-2 number, since 2×1205501481² = 2906467641386386722, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205501489) 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, 23680 + ... + 54513.

It is an arithmetic number, because the mean of its divisors is an integer number (111817420).

Almost surely, 2^1205501481 is an apocalyptic number.

It is an amenable number.

1205501481 is a deficient number, since it is larger than the sum of its proper divisors (583577239).

1205501481 is an equidigital number, since it uses as much as digits as its factorization.

1205501481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78773 (or 78767 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 1205501481 is about 34720.3323860818. The cubic root of 1205501481 is about 1064.2800371049.

The spelling of 1205501481 in words is "one billion, two hundred five million, five hundred one thousand, four hundred eighty-one".