1538225 has 12 divisors (see below), whose sum is σ = 2054556. Its totient is φ = 1135680.

The previous prime is 1538213. The next prime is 1538227. The reversal of 1538225 is 5228351.

It can be written as a sum of positive squares in 6 ways, for example, as 369664 + 1168561 = 608^2 + 1081^2 .

It is not a de Polignac number, because 1538225 - 2⁸ = 1537969 is a prime.

It is a super-2 number, since 2×1538225² = 4732272301250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1538194 and 1538203.

It is not an unprimeable number, because it can be changed into a prime (1538227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2042 + ... + 2691.

It is an arithmetic number, because the mean of its divisors is an integer number (171213).

2^1538225 is an apocalyptic number.

It is an amenable number.

1538225 is a deficient number, since it is larger than the sum of its proper divisors (516331).

1538225 is a wasteful number, since it uses less digits than its factorization.

1538225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756 (or 4751 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 1538225 is about 1240.2519905245. The cubic root of 1538225 is about 115.4356506429.

It can be divided in two parts, 15 and 38225, that multiplied together give a palindrome (573375).

The spelling of 1538225 in words is "one million, five hundred thirty-eight thousand, two hundred twenty-five".