1611225 has 96 divisors (see below), whose sum is σ = 3809280. Its totient is φ = 648000.

The previous prime is 1611223. The next prime is 1611227. The reversal of 1611225 is 5221161.

1611225 = 16³ + 17³ + ... + 50³.

It is an interprime number because it is at equal distance from previous prime (1611223) and next prime (1611227).

It is not a de Polignac number, because 1611225 - 2¹ = 1611223 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1611198 and 1611207.

It is not an unprimeable number, because it can be changed into a prime (1611223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51960 + ... + 51990.

It is an arithmetic number, because the mean of its divisors is an integer number (39680).

2^1611225 is an apocalyptic number.

1611225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1611225 is an abundant number, since it is smaller than the sum of its proper divisors (2198055).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1611225 is a wasteful number, since it uses less digits than its factorization.

1611225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 57 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1611225 is about 1269.3403798824. The cubic root of 1611225 is about 117.2335898705.

Adding to 1611225 its reverse (5221161), we get a palindrome (6832386).

The spelling of 1611225 in words is "one million, six hundred eleven thousand, two hundred twenty-five".