1225161037 has 4 divisors (see below), whose sum is σ = 1225240636. Its totient is φ = 1225081440.

The previous prime is 1225160977. The next prime is 1225161073. The reversal of 1225161037 is 7301615221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 835730281 + 389430756 = 28909^2 + 19734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225161037 - 2¹⁵ = 1225128269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225160996 and 1225161014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225141037) 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, 8514 + ... + 50227.

It is an arithmetic number, because the mean of its divisors is an integer number (306310159).

Almost surely, 2^1225161037 is an apocalyptic number.

It is an amenable number.

1225161037 is a deficient number, since it is larger than the sum of its proper divisors (79599).

1225161037 is an equidigital number, since it uses as much as digits as its factorization.

1225161037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79598.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1225161037 is about 35002.3004529702. The cubic root of 1225161037 is about 1070.0343649254.

Adding to 1225161037 its reverse (7301615221), we get a palindrome (8526776258).

The spelling of 1225161037 in words is "one billion, two hundred twenty-five million, one hundred sixty-one thousand, thirty-seven".