1242642229 has 4 divisors (see below), whose sum is σ = 1296670176. Its totient is φ = 1188614284.

The previous prime is 1242642179. The next prime is 1242642277. The reversal of 1242642229 is 9222462421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1242642229 - 2¹³ = 1242634037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242642194 and 1242642203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242642329) 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, 27013939 + ... + 27013984.

It is an arithmetic number, because the mean of its divisors is an integer number (324167544).

Almost surely, 2^1242642229 is an apocalyptic number.

It is an amenable number.

1242642229 is a deficient number, since it is larger than the sum of its proper divisors (54027947).

1242642229 is an equidigital number, since it uses as much as digits as its factorization.

1242642229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54027946.

The product of its digits is 27648, while the sum is 34.

The square root of 1242642229 is about 35251.1308896608. The cubic root of 1242642229 is about 1075.0996061302.

The spelling of 1242642229 in words is "one billion, two hundred forty-two million, six hundred forty-two thousand, two hundred twenty-nine".