1242020541 has 8 divisors (see below), whose sum is σ = 1676990080. Its totient is φ = 817532352.

The previous prime is 1242020513. The next prime is 1242020569. The reversal of 1242020541 is 1450202421.

It is an interprime number because it is at equal distance from previous prime (1242020513) and next prime (1242020569).

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

It is not a de Polignac number, because 1242020541 - 2⁷ = 1242020413 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 (1242020501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2620060 + ... + 2620533.

It is an arithmetic number, because the mean of its divisors is an integer number (209623760).

Almost surely, 2^1242020541 is an apocalyptic number.

It is an amenable number.

1242020541 is a deficient number, since it is larger than the sum of its proper divisors (434969539).

1242020541 is an equidigital number, since it uses as much as digits as its factorization.

1242020541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240675.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1242020541 is about 35242.3117998806. The cubic root of 1242020541 is about 1074.9202871486.

Adding to 1242020541 its reverse (1450202421), we get a palindrome (2692222962).

The spelling of 1242020541 in words is "one billion, two hundred forty-two million, twenty thousand, five hundred forty-one".