1242451544 has 16 divisors (see below), whose sum is σ = 2336315400. Its totient is φ = 619434112.

The previous prime is 1242451543. The next prime is 1242451603. The reversal of 1242451544 is 4451542421.

It is a self number, because there is not a number n which added to its sum of digits gives 1242451544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242451543) 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 3 ways as a sum of consecutive naturals, for example, 221009 + ... + 226560.

Almost surely, 2^1242451544 is an apocalyptic number.

It is an amenable number.

1242451544 is a deficient number, since it is larger than the sum of its proper divisors (1093863856).

1242451544 is a wasteful number, since it uses less digits than its factorization.

1242451544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447922 (or 447918 counting only the distinct ones).

The product of its digits is 25600, while the sum is 32.

The square root of 1242451544 is about 35248.4261208923. The cubic root of 1242451544 is about 1075.0446115252.

Adding to 1242451544 its reverse (4451542421), we get a palindrome (5693993965).

The spelling of 1242451544 in words is "one billion, two hundred forty-two million, four hundred fifty-one thousand, five hundred forty-four".