1242087151 has 8 divisors (see below), whose sum is σ = 1278885440. Its totient is φ = 1205458848.

The previous prime is 1242087149. The next prime is 1242087173. The reversal of 1242087151 is 1517802421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242087151 - 2¹ = 1242087149 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 (1242027151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27591 + ... + 56968.

It is an arithmetic number, because the mean of its divisors is an integer number (159860680).

Almost surely, 2^1242087151 is an apocalyptic number.

1242087151 is a deficient number, since it is larger than the sum of its proper divisors (36798289).

1242087151 is an equidigital number, since it uses as much as digits as its factorization.

1242087151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84993.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1242087151 is about 35243.2568160208. The cubic root of 1242087151 is about 1074.9395029233.

Adding to 1242087151 its reverse (1517802421), we get a palindrome (2759889572).

The spelling of 1242087151 in words is "one billion, two hundred forty-two million, eighty-seven thousand, one hundred fifty-one".