1243540102 has 8 divisors (see below), whose sum is σ = 2131783056. Its totient is φ = 532945752.

The previous prime is 1243540087. The next prime is 1243540153. The reversal of 1243540102 is 2010453421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44412133 + ... + 44412160.

It is an arithmetic number, because the mean of its divisors is an integer number (266472882).

Almost surely, 2^1243540102 is an apocalyptic number.

1243540102 is a deficient number, since it is larger than the sum of its proper divisors (888242954).

1243540102 is an equidigital number, since it uses as much as digits as its factorization.

1243540102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88824302.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1243540102 is about 35263.8639686578. The cubic root of 1243540102 is about 1075.3584820656.

Adding to 1243540102 its reverse (2010453421), we get a palindrome (3253993523).

The spelling of 1243540102 in words is "one billion, two hundred forty-three million, five hundred forty thousand, one hundred two".