1243861485 has 16 divisors (see below), whose sum is σ = 2038720320. Its totient is φ = 647212160.

The previous prime is 1243861483. The next prime is 1243861517. The reversal of 1243861485 is 5841683421.

It is a happy number.

1243861485 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1243861485 - 2¹ = 1243861483 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243861481) 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, 1010655 + ... + 1011884.

It is an arithmetic number, because the mean of its divisors is an integer number (127420020).

Almost surely, 2^1243861485 is an apocalyptic number.

1243861485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243861485 is a deficient number, since it is larger than the sum of its proper divisors (794858835).

1243861485 is a wasteful number, since it uses less digits than its factorization.

1243861485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022588.

The product of its digits is 184320, while the sum is 42.

The square root of 1243861485 is about 35268.4205061695. The cubic root of 1243861485 is about 1075.4511133543.

The spelling of 1243861485 in words is "one billion, two hundred forty-three million, eight hundred sixty-one thousand, four hundred eighty-five".