1252822001 has 4 divisors (see below), whose sum is σ = 1253145600. Its totient is φ = 1252498404.

The previous prime is 1252821991. The next prime is 1252822009. The reversal of 1252822001 is 1002282521.

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: 1002282521 = 61 ⋅16430861.

It is a cyclic number.

It is not a de Polignac number, because 1252822001 - 2¹⁰ = 1252820977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1252822009) 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, 155921 + ... + 163758.

It is an arithmetic number, because the mean of its divisors is an integer number (313286400).

Almost surely, 2^1252822001 is an apocalyptic number.

It is an amenable number.

1252822001 is a deficient number, since it is larger than the sum of its proper divisors (323599).

1252822001 is an equidigital number, since it uses as much as digits as its factorization.

1252822001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323598.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1252822001 is about 35395.2256808740. The cubic root of 1252822001 is about 1078.0273779910.

The spelling of 1252822001 in words is "one billion, two hundred fifty-two million, eight hundred twenty-two thousand, one".