1242311239 has 8 divisors (see below), whose sum is σ = 1338503040. Its totient is φ = 1146209376.

The previous prime is 1242311221. The next prime is 1242311269. The reversal of 1242311239 is 9321132421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242311239 - 2¹³ = 1242303047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242311269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7722 + ... + 50440.

It is an arithmetic number, because the mean of its divisors is an integer number (167312880).

Almost surely, 2^1242311239 is an apocalyptic number.

1242311239 is a deficient number, since it is larger than the sum of its proper divisors (96191801).

1242311239 is a wasteful number, since it uses less digits than its factorization.

1242311239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44969.

The product of its digits is 2592, while the sum is 28.

The square root of 1242311239 is about 35246.4358339960. The cubic root of 1242311239 is about 1075.0041431966.

It can be divided in two parts, 1242 and 311239, that added together give a square (312481 = 559²).

The spelling of 1242311239 in words is "one billion, two hundred forty-two million, three hundred eleven thousand, two hundred thirty-nine".