1287225 has 24 divisors (see below), whose sum is σ = 2365920. Its totient is φ = 686160.

The previous prime is 1287217. The next prime is 1287233. The reversal of 1287225 is 5227821.

It is an interprime number because it is at equal distance from previous prime (1287217) and next prime (1287233).

It is not a de Polignac number, because 1287225 - 2³ = 1287217 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (98580).

2^1287225 is an apocalyptic number.

1287225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1287225 is a deficient number, since it is larger than the sum of its proper divisors (1078695).

1287225 is a wasteful number, since it uses less digits than its factorization.

1287225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926 (or 1915 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1287225 is about 1134.5593858410. The cubic root of 1287225 is about 108.7806096951.

The spelling of 1287225 in words is "one million, two hundred eighty-seven thousand, two hundred twenty-five".