1242020215 has 8 divisors (see below), whose sum is σ = 1568867760. Its totient is φ = 941320512.

The previous prime is 1242020203. The next prime is 1242020233. The reversal of 1242020215 is 5120202421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242020215 is a prime.

It is a super-2 number, since 2×1242020215² = 3085228428937292450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 1242020192 and 1242020201.

It is a congruent number.

It is an unprimeable number.

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, 6536854 + ... + 6537043.

It is an arithmetic number, because the mean of its divisors is an integer number (196108470).

Almost surely, 2^1242020215 is an apocalyptic number.

1242020215 is a deficient number, since it is larger than the sum of its proper divisors (326847545).

1242020215 is a wasteful number, since it uses less digits than its factorization.

1242020215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13073921.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1242020215 is about 35242.3071747580. The cubic root of 1242020215 is about 1074.9201931019.

Adding to 1242020215 its reverse (5120202421), we get a palindrome (6362222636).

The spelling of 1242020215 in words is "one billion, two hundred forty-two million, twenty thousand, two hundred fifteen".