1242216061 has 8 divisors (see below), whose sum is σ = 1317332160. Its totient is φ = 1167327168.

The previous prime is 1242216043. The next prime is 1242216077. The reversal of 1242216061 is 1606122421.

It is a happy number.

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

It is not a de Polignac number, because 1242216061 - 2⁹ = 1242215549 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 (1242216091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45471 + ... + 67468.

It is an arithmetic number, because the mean of its divisors is an integer number (164666520).

Almost surely, 2^1242216061 is an apocalyptic number.

It is an amenable number.

1242216061 is a deficient number, since it is larger than the sum of its proper divisors (75116099).

1242216061 is a wasteful number, since it uses less digits than its factorization.

1242216061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113603.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1242216061 is about 35245.0856290632. The cubic root of 1242216061 is about 1074.9766891646.

Adding to 1242216061 its reverse (1606122421), we get a palindrome (2848338482).

The spelling of 1242216061 in words is "one billion, two hundred forty-two million, two hundred sixteen thousand, sixty-one".