1242222061 has 4 divisors (see below), whose sum is σ = 1255028572. Its totient is φ = 1229415552.

The previous prime is 1242222043. The next prime is 1242222083. The reversal of 1242222061 is 1602222421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1602222421 = 29 ⋅55249049.

It can be written as a sum of positive squares in 2 ways, for example, as 231617961 + 1010604100 = 15219^2 + 31790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242222061 - 2⁵ = 1242222029 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 (1242222661) 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, 6403110 + ... + 6403303.

It is an arithmetic number, because the mean of its divisors is an integer number (313757143).

Almost surely, 2^1242222061 is an apocalyptic number.

It is an amenable number.

1242222061 is a deficient number, since it is larger than the sum of its proper divisors (12806511).

1242222061 is an equidigital number, since it uses as much as digits as its factorization.

1242222061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12806510.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1242222061 is about 35245.1707472102. The cubic root of 1242222061 is about 1074.9784199021.

Adding to 1242222061 its reverse (1602222421), we get a palindrome (2844444482).

The spelling of 1242222061 in words is "one billion, two hundred forty-two million, two hundred twenty-two thousand, sixty-one".