1242431554 has 36 divisors (see below), whose sum is σ = 2347538274. Its totient is φ = 491504832.

The previous prime is 1242431539. The next prime is 1242431557. The reversal of 1242431554 is 4551342421.

It can be written as a sum of positive squares in 3 ways, for example, as 452540529 + 789891025 = 21273^2 + 28105^2 .

It is not an unprimeable number, because it can be changed into a prime (1242431557) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20947 + ... + 54070.

Almost surely, 2^1242431554 is an apocalyptic number.

1242431554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1242431554 is a deficient number, since it is larger than the sum of its proper divisors (1105106720).

1242431554 is a wasteful number, since it uses less digits than its factorization.

1242431554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75059 (or 75039 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 1242431554 is about 35248.1425609918. The cubic root of 1242431554 is about 1075.0388459732.

Adding to 1242431554 its reverse (4551342421), we get a palindrome (5793773975).

The spelling of 1242431554 in words is "one billion, two hundred forty-two million, four hundred thirty-one thousand, five hundred fifty-four".