1242151234 has 32 divisors (see below), whose sum is σ = 1931529600. Its totient is φ = 598752000.

The previous prime is 1242151231. The next prime is 1242151243. The reversal of 1242151234 is 4321512421.

It is a junction number, because it is equal to n+sod(n) for n = 1242151199 and 1242151208.

It is not an unprimeable number, because it can be changed into a prime (1242151231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3097434 + ... + 3097834.

It is an arithmetic number, because the mean of its divisors is an integer number (60360300).

Almost surely, 2^1242151234 is an apocalyptic number.

1242151234 is a deficient number, since it is larger than the sum of its proper divisors (689378366).

1242151234 is a wasteful number, since it uses less digits than its factorization.

1242151234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its digits is 1920, while the sum is 25.

The square root of 1242151234 is about 35244.1659569353. The cubic root of 1242151234 is about 1074.9579890559.

Adding to 1242151234 its reverse (4321512421), we get a palindrome (5563663655).

The spelling of 1242151234 in words is "one billion, two hundred forty-two million, one hundred fifty-one thousand, two hundred thirty-four".