1225395 has 32 divisors (see below), whose sum is σ = 2260800. Its totient is φ = 628992.

The previous prime is 1225381. The next prime is 1225397. The reversal of 1225395 is 5935221.

1225395 is a `hidden beast` number, since 122 + 539 + 5 = 666.

1225395 is a nontrivial binomial coefficient, being equal to C(1566, 2).

It is not a de Polignac number, because 1225395 - 2⁶ = 1225331 is a prime.

It is a super-3 number, since 3×1225395³ = 5520133317235514625, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

1225395 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1225397) 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 31 ways as a sum of consecutive naturals, for example, 3759 + ... + 4071.

It is an arithmetic number, because the mean of its divisors is an integer number (70650).

2^1225395 is an apocalyptic number.

1225395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1225395 is the 1565-th triangular number and also the 783-rd hexagonal number.

1225395 is a deficient number, since it is larger than the sum of its proper divisors (1035405).

1225395 is a wasteful number, since it uses less digits than its factorization.

1225395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 350 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1225395 is about 1106.9756094874. The cubic root of 1225395 is about 107.0102473663.

The spelling of 1225395 in words is "one million, two hundred twenty-five thousand, three hundred ninety-five".