1230542040 has 128 divisors (see below), whose sum is σ = 4543580160. Its totient is φ = 259628544.

The previous prime is 1230541987. The next prime is 1230542077. The reversal of 1230542040 is 402450321.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1230541998 and 1230542016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45424 + ... + 67263.

It is an arithmetic number, because the mean of its divisors is an integer number (35496720).

Almost surely, 2^1230542040 is an apocalyptic number.

1230542040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230542040 is an abundant number, since it is smaller than the sum of its proper divisors (3313038120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1230542040 is a wasteful number, since it uses less digits than its factorization.

1230542040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112721 (or 112717 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1230542040 is about 35079.0826561927. The cubic root of 1230542040 is about 1071.5986352018.

Adding to 1230542040 its reverse (402450321), we get a palindrome (1632992361).

It can be divided in two parts, 12305 and 42040, that added together give a palindrome (54345).

The spelling of 1230542040 in words is "one billion, two hundred thirty million, five hundred forty-two thousand, forty".