1243040148 has 48 divisors (see below), whose sum is σ = 3683084160. Its totient is φ = 355154112.

The previous prime is 1243040147. The next prime is 1243040179. The reversal of 1243040148 is 8410403421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243040147) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 821361 + ... + 822872.

It is an arithmetic number, because the mean of its divisors is an integer number (76730920).

Almost surely, 2^1243040148 is an apocalyptic number.

1243040148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1243040148 is an abundant number, since it is smaller than the sum of its proper divisors (2440044012).

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

1243040148 is a wasteful number, since it uses less digits than its factorization.

1243040148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644253 (or 1644245 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1243040148 is about 35256.7744979600. The cubic root of 1243040148 is about 1075.2143500456.

Adding to 1243040148 its reverse (8410403421), we get a palindrome (9653443569).

The spelling of 1243040148 in words is "one billion, two hundred forty-three million, forty thousand, one hundred forty-eight".