1242220516 has 12 divisors (see below), whose sum is σ = 2176422640. Its totient is φ = 620385480.

The previous prime is 1242220489. The next prime is 1242220517. The reversal of 1242220516 is 6150222421.

It is a super-2 number, since 2×1242220516² = 3086223620742612512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242220517) 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, 177330 + ... + 184201.

Almost surely, 2^1242220516 is an apocalyptic number.

It is an amenable number.

1242220516 is a deficient number, since it is larger than the sum of its proper divisors (934202124).

1242220516 is a wasteful number, since it uses less digits than its factorization.

1242220516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362394 (or 362392 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1242220516 is about 35245.1488293070. The cubic root of 1242220516 is about 1074.9779742377.

Adding to 1242220516 its reverse (6150222421), we get a palindrome (7392442937).

The spelling of 1242220516 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, five hundred sixteen".