1242076141 has 4 divisors (see below), whose sum is σ = 1249987612. Its totient is φ = 1234164672.

The previous prime is 1242076139. The next prime is 1242076183. The reversal of 1242076141 is 1416702421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1416702421 = 10937 ⋅129533.

It can be written as a sum of positive squares in 2 ways, for example, as 933546916 + 308529225 = 30554^2 + 17565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242076141 - 2¹ = 1242076139 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 (1242076111) 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, 3955500 + ... + 3955813.

It is an arithmetic number, because the mean of its divisors is an integer number (312496903).

Almost surely, 2^1242076141 is an apocalyptic number.

It is an amenable number.

1242076141 is a deficient number, since it is larger than the sum of its proper divisors (7911471).

1242076141 is an equidigital number, since it uses as much as digits as its factorization.

1242076141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911470.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1242076141 is about 35243.1006155815. The cubic root of 1242076141 is about 1074.9363267857.

Adding to 1242076141 its reverse (1416702421), we get a palindrome (2658778562).

The spelling of 1242076141 in words is "one billion, two hundred forty-two million, seventy-six thousand, one hundred forty-one".