1212342541 has 4 divisors (see below), whose sum is σ = 1213339932. Its totient is φ = 1211345152.

The previous prime is 1212342529. The next prime is 1212342553. The reversal of 1212342541 is 1452432121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1452432121 = 7 ⋅207490303.

It is an interprime number because it is at equal distance from previous prime (1212342529) and next prime (1212342553).

It can be written as a sum of positive squares in 2 ways, for example, as 944332900 + 268009641 = 30730^2 + 16371^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212342541 - 2²¹ = 1210245389 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 (1212372541) 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, 496870 + ... + 499303.

It is an arithmetic number, because the mean of its divisors is an integer number (303334983).

Almost surely, 2^1212342541 is an apocalyptic number.

It is an amenable number.

1212342541 is a deficient number, since it is larger than the sum of its proper divisors (997391).

1212342541 is an equidigital number, since it uses as much as digits as its factorization.

1212342541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997390.

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

The square root of 1212342541 is about 34818.7096400771. The cubic root of 1212342541 is about 1066.2894565409.

Adding to 1212342541 its reverse (1452432121), we get a palindrome (2664774662).

The spelling of 1212342541 in words is "one billion, two hundred twelve million, three hundred forty-two thousand, five hundred forty-one".