1242340401 has 8 divisors (see below), whose sum is σ = 1673531104. Its totient is φ = 819688320.

The previous prime is 1242340387. The next prime is 1242340427. The reversal of 1242340401 is 1040432421.

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

It is not a de Polignac number, because 1242340401 - 2⁵ = 1242340369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242340901) 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, 2134315 + ... + 2134896.

It is an arithmetic number, because the mean of its divisors is an integer number (209191388).

Almost surely, 2^1242340401 is an apocalyptic number.

It is an amenable number.

1242340401 is a deficient number, since it is larger than the sum of its proper divisors (431190703).

1242340401 is an equidigital number, since it uses as much as digits as its factorization.

1242340401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269311.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1242340401 is about 35246.8495187868. The cubic root of 1242340401 is about 1075.0125546758.

Adding to 1242340401 its reverse (1040432421), we get a palindrome (2282772822).

The spelling of 1242340401 in words is "one billion, two hundred forty-two million, three hundred forty thousand, four hundred one".