1142256001 has 4 divisors (see below), whose sum is σ = 1142659504. Its totient is φ = 1141852500.

The previous prime is 1142255929. The next prime is 1142256007. The reversal of 1142256001 is 1006522411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1006522411 = 269 ⋅3741719.

It is a cyclic number.

It is not a de Polignac number, because 1142256001 - 2¹³ = 1142247809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142256007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197475 + ... + 203176.

It is an arithmetic number, because the mean of its divisors is an integer number (285664876).

Almost surely, 2^1142256001 is an apocalyptic number.

It is an amenable number.

1142256001 is a deficient number, since it is larger than the sum of its proper divisors (403503).

1142256001 is an equidigital number, since it uses as much as digits as its factorization.

1142256001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403502.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1142256001 is about 33797.2780116979. The cubic root of 1142256001 is about 1045.3325715132.

Adding to 1142256001 its reverse (1006522411), we get a palindrome (2148778412).

The spelling of 1142256001 in words is "one billion, one hundred forty-two million, two hundred fifty-six thousand, one".