1242220936 has 16 divisors (see below), whose sum is σ = 2540906640. Its totient is φ = 564645840.

The previous prime is 1242220867. The next prime is 1242220939. The reversal of 1242220936 is 6390222421.

It is a super-2 number, since 2×1242220936² = 3086225707673432192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242220898 and 1242220907.

It is not an unprimeable number, because it can be changed into a prime (1242220939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7057986 + ... + 7058161.

It is an arithmetic number, because the mean of its divisors is an integer number (158806665).

Almost surely, 2^1242220936 is an apocalyptic number.

It is an amenable number.

1242220936 is an abundant number, since it is smaller than the sum of its proper divisors (1298685704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242220936 is a wasteful number, since it uses less digits than its factorization.

1242220936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14116164 (or 14116160 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1242220936 is about 35245.1547875733. The cubic root of 1242220936 is about 1074.9780953893.

The spelling of 1242220936 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, nine hundred thirty-six".