1542225 has 12 divisors (see below), whose sum is σ = 2549936. Its totient is φ = 822480.

The previous prime is 1542221. The next prime is 1542239. The reversal of 1542225 is 5222451.

It is a happy number.

It is not a de Polignac number, because 1542225 - 2² = 1542221 is a prime.

It is a Duffinian number.

It is a Curzon number.

1542225 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1542221) 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, 10207 + ... + 10356.

2^1542225 is an apocalyptic number.

1542225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1542225 is a deficient number, since it is larger than the sum of its proper divisors (1007711).

1542225 is a wasteful number, since it uses less digits than its factorization.

1542225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20576 (or 20571 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 1542225 is about 1241.8635190712. The cubic root of 1542225 is about 115.5356236510.

Adding to 1542225 its reverse (5222451), we get a palindrome (6764676).

It can be divided in two parts, 15 and 42225, that multiplied together give a triangular number (633375 = T₁₁₂₅).

The spelling of 1542225 in words is "one million, five hundred forty-two thousand, two hundred twenty-five".