1242123141 has 8 divisors (see below), whose sum is σ = 1892759104. Its totient is φ = 709784640.

The previous prime is 1242123109. The next prime is 1242123143. The reversal of 1242123141 is 1413212421.

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

It is not a de Polignac number, because 1242123141 - 2⁵ = 1242123109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 59148721 = 1242123141 / (1 + 2 + 4 + 2 + 1 + 2 + 3 + 1 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242123143) 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, 29574340 + ... + 29574381.

It is an arithmetic number, because the mean of its divisors is an integer number (236594888).

Almost surely, 2^1242123141 is an apocalyptic number.

It is an amenable number.

1242123141 is a deficient number, since it is larger than the sum of its proper divisors (650635963).

1242123141 is an equidigital number, since it uses as much as digits as its factorization.

1242123141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59148731.

The product of its digits is 384, while the sum is 21.

The square root of 1242123141 is about 35243.7674064507. The cubic root of 1242123141 is about 1074.9498850984.

Adding to 1242123141 its reverse (1413212421), we get a palindrome (2655335562).

The spelling of 1242123141 in words is "one billion, two hundred forty-two million, one hundred twenty-three thousand, one hundred forty-one".