1611212425 has 6 divisors (see below), whose sum is σ = 1997903438. Its totient is φ = 1288969920.

The previous prime is 1611212411. The next prime is 1611212441. The reversal of 1611212425 is 5242121161.

It can be written as a sum of positive squares in 3 ways, for example, as 1838736 + 1609373689 = 1356^2 + 40117^2 .

It is not a de Polignac number, because 1611212425 - 2¹⁵ = 1611179657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 64448497 = 1611212425 / (1 + 6 + 1 + 1 + 2 + 1 + 2 + 4 + 2 + 5).

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 1611212425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32224224 + ... + 32224273.

Almost surely, 2^1611212425 is an apocalyptic number.

It is an amenable number.

1611212425 is a deficient number, since it is larger than the sum of its proper divisors (386691013).

1611212425 is an equidigital number, since it uses as much as digits as its factorization.

1611212425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64448507 (or 64448502 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1611212425 is about 40139.9106252119. The cubic root of 1611212425 is about 1172.3328488177.

Adding to 1611212425 its reverse (5242121161), we get a palindrome (6853333586).

The spelling of 1611212425 in words is "one billion, six hundred eleven million, two hundred twelve thousand, four hundred twenty-five".