1022256001 has 4 divisors (see below), whose sum is σ = 1100891092. Its totient is φ = 943620912.

The previous prime is 1022255987. The next prime is 1022256023. The reversal of 1022256001 is 1006522201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1006522201 = 4129 ⋅243769.

It can be written as a sum of positive squares in 2 ways, for example, as 526748401 + 495507600 = 22951^2 + 22260^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1022256001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022256001.

It is not an unprimeable number, because it can be changed into a prime (1022256701) 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, 39317526 + ... + 39317551.

It is an arithmetic number, because the mean of its divisors is an integer number (275222773).

Almost surely, 2^1022256001 is an apocalyptic number.

It is an amenable number.

1022256001 is a deficient number, since it is larger than the sum of its proper divisors (78635091).

1022256001 is an equidigital number, since it uses as much as digits as its factorization.

1022256001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78635090.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1022256001 is about 31972.7384032084. The cubic root of 1022256001 is about 1007.3643009424.

Adding to 1022256001 its reverse (1006522201), we get a palindrome (2028778202).

The spelling of 1022256001 in words is "one billion, twenty-two million, two hundred fifty-six thousand, one".