1142640401 has 8 divisors (see below), whose sum is σ = 1341168960. Its totient is φ = 952935408.

The previous prime is 1142640379. The next prime is 1142640407. The reversal of 1142640401 is 1040462411.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1142640401 - 2⁶ = 1142640337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142640407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2205611 + ... + 2206128.

It is an arithmetic number, because the mean of its divisors is an integer number (167646120).

Almost surely, 2^1142640401 is an apocalyptic number.

It is an amenable number.

1142640401 is a deficient number, since it is larger than the sum of its proper divisors (198528559).

1142640401 is an equidigital number, since it uses as much as digits as its factorization.

1142640401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411783.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1142640401 is about 33802.9643818408. The cubic root of 1142640401 is about 1045.4498192445.

The spelling of 1142640401 in words is "one billion, one hundred forty-two million, six hundred forty thousand, four hundred one".