1242053440 has 56 divisors (see below), whose sum is σ = 3053071872. Its totient is φ = 480791040.

The previous prime is 1242053419. The next prime is 1242053479. The reversal of 1242053440 is 443502421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52684 + ... + 72523.

Almost surely, 2^1242053440 is an apocalyptic number.

1242053440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242053440 is an abundant number, since it is smaller than the sum of its proper divisors (1811018432).

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

1242053440 is a wasteful number, since it uses less digits than its factorization.

1242053440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125255 (or 125245 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1242053440 is about 35242.7785510734. The cubic root of 1242053440 is about 1074.9297779982.

Adding to 1242053440 its reverse (443502421), we get a palindrome (1685555861).

The spelling of 1242053440 in words is "one billion, two hundred forty-two million, fifty-three thousand, four hundred forty".