1553225 has 6 divisors (see below), whose sum is σ = 1926030. Its totient is φ = 1242560.

The previous prime is 1553191. The next prime is 1553249. The reversal of 1553225 is 5223551.

It can be written as a sum of positive squares in 3 ways, for example, as 414736 + 1138489 = 644^2 + 1067^2 .

It is not a de Polignac number, because 1553225 - 2¹² = 1549129 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553225.

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, 31040 + ... + 31089.

It is an arithmetic number, because the mean of its divisors is an integer number (321005).

2^1553225 is an apocalyptic number.

It is an amenable number.

1553225 is a deficient number, since it is larger than the sum of its proper divisors (372805).

1553225 is an equidigital number, since it uses as much as digits as its factorization.

1553225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62139 (or 62134 counting only the distinct ones).

The product of its digits is 1500, while the sum is 23.

The square root of 1553225 is about 1246.2844779584. The cubic root of 1553225 is about 115.8096610989.

Adding to 1553225 its reverse (5223551), we get a palindrome (6776776).

The spelling of 1553225 in words is "one million, five hundred fifty-three thousand, two hundred twenty-five".