1242220502 has 4 divisors (see below), whose sum is σ = 1863330756. Its totient is φ = 621110250.

The previous prime is 1242220489. The next prime is 1242220517. The reversal of 1242220502 is 2050222421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2050222421 = 13 ⋅157709417.

It is a super-2 number, since 2×1242220502² = 3086223551178264008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310555124 + ... + 310555127.

It is an arithmetic number, because the mean of its divisors is an integer number (465832689).

Almost surely, 2^1242220502 is an apocalyptic number.

1242220502 is a deficient number, since it is larger than the sum of its proper divisors (621110254).

1242220502 is an equidigital number, since it uses as much as digits as its factorization.

1242220502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621110253.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1242220502 is about 35245.1486306981. The cubic root of 1242220502 is about 1074.9779701994.

Adding to 1242220502 its reverse (2050222421), we get a palindrome (3292442923).

The spelling of 1242220502 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, five hundred two".