1001225251 has 8 divisors (see below), whose sum is σ = 1141668864. Its totient is φ = 869842560.

The previous prime is 1001225231. The next prime is 1001225297. The reversal of 1001225251 is 1525221001.

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 1001225251 - 2⁵ = 1001225219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001225231) 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, 2264995 + ... + 2265436.

It is an arithmetic number, because the mean of its divisors is an integer number (142708608).

Almost surely, 2^1001225251 is an apocalyptic number.

1001225251 is a deficient number, since it is larger than the sum of its proper divisors (140443613).

1001225251 is a wasteful number, since it uses less digits than its factorization.

1001225251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530461.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1001225251 is about 31642.1435904712. The cubic root of 1001225251 is about 1000.4082503090.

Adding to 1001225251 its reverse (1525221001), we get a palindrome (2526446252).

The spelling of 1001225251 in words is "one billion, one million, two hundred twenty-five thousand, two hundred fifty-one".