1001225237 has 4 divisors (see below), whose sum is σ = 1001499756. Its totient is φ = 1000950720.

The previous prime is 1001225231. The next prime is 1001225297. The reversal of 1001225237 is 7325221001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81558961 + 919666276 = 9031^2 + 30326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001225237 - 2²⁴ = 984448021 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 131714 + ... + 139107.

It is an arithmetic number, because the mean of its divisors is an integer number (250374939).

Almost surely, 2^1001225237 is an apocalyptic number.

It is an amenable number.

1001225237 is a deficient number, since it is larger than the sum of its proper divisors (274519).

1001225237 is an equidigital number, since it uses as much as digits as its factorization.

1001225237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274518.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1001225237 is about 31642.1433692473. The cubic root of 1001225237 is about 1000.4082456461.

Adding to 1001225237 its reverse (7325221001), we get a palindrome (8326446238).

The spelling of 1001225237 in words is "one billion, one million, two hundred twenty-five thousand, two hundred thirty-seven".