1242140501 has 4 divisors (see below), whose sum is σ = 1419589152. Its totient is φ = 1064691852.

The previous prime is 1242140467. The next prime is 1242140509. The reversal of 1242140501 is 1050412421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1242140501 - 2¹⁰ = 1242139477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242140509) 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, 88724315 + ... + 88724328.

It is an arithmetic number, because the mean of its divisors is an integer number (354897288).

Almost surely, 2^1242140501 is an apocalyptic number.

It is an amenable number.

1242140501 is a deficient number, since it is larger than the sum of its proper divisors (177448651).

1242140501 is an equidigital number, since it uses as much as digits as its factorization.

1242140501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177448650.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1242140501 is about 35244.0136902709. The cubic root of 1242140501 is about 1074.9548929334.

Adding to 1242140501 its reverse (1050412421), we get a palindrome (2292552922).

The spelling of 1242140501 in words is "one billion, two hundred forty-two million, one hundred forty thousand, five hundred one".