1242151433 has 4 divisors (see below), whose sum is σ = 1248393600. Its totient is φ = 1235909268.

The previous prime is 1242151411. The next prime is 1242151481. The reversal of 1242151433 is 3341512421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3341512421 = 13 ⋅257039417.

It is a cyclic number.

It is not a de Polignac number, because 1242151433 - 2¹⁰ = 1242150409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242150433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3120785 + ... + 3121182.

It is an arithmetic number, because the mean of its divisors is an integer number (312098400).

Almost surely, 2^1242151433 is an apocalyptic number.

It is an amenable number.

1242151433 is a deficient number, since it is larger than the sum of its proper divisors (6242167).

1242151433 is an equidigital number, since it uses as much as digits as its factorization.

1242151433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242166.

The product of its digits is 2880, while the sum is 26.

The square root of 1242151433 is about 35244.1687800975. The cubic root of 1242151433 is about 1074.9580464608.

Adding to 1242151433 its reverse (3341512421), we get a palindrome (4583663854).

The spelling of 1242151433 in words is "one billion, two hundred forty-two million, one hundred fifty-one thousand, four hundred thirty-three".