1242254540 has 24 divisors (see below), whose sum is σ = 2612720880. Its totient is φ = 496142528.

The previous prime is 1242254513. The next prime is 1242254551. The reversal of 1242254540 is 454522421.

It is a super-2 number, since 2×1242254540² = 3086392684301223200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 33947 + ... + 60306.

It is an arithmetic number, because the mean of its divisors is an integer number (108863370).

Almost surely, 2^1242254540 is an apocalyptic number.

1242254540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242254540 is an abundant number, since it is smaller than the sum of its proper divisors (1370466340).

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

1242254540 is a wasteful number, since it uses less digits than its factorization.

1242254540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94921 (or 94919 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1242254540 is about 35245.6315023578. The cubic root of 1242254540 is about 1074.9877885759.

Adding to 1242254540 its reverse (454522421), we get a palindrome (1696776961).

The spelling of 1242254540 in words is "one billion, two hundred forty-two million, two hundred fifty-four thousand, five hundred forty".