1217025 has 30 divisors (see below), whose sum is σ = 2258102. Its totient is φ = 648000.

The previous prime is 1217023. The next prime is 1217033. The reversal of 1217025 is 5207121.

It can be written as a sum of positive squares in 3 ways, for example, as 219024 + 998001 = 468^2 + 999^2 .

It is not a de Polignac number, because 1217025 - 2¹ = 1217023 is a prime.

It is a super-2 number, since 2×1217025² = 2962299701250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1216989 and 1217007.

It is not an unprimeable number, because it can be changed into a prime (1217023) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1725 + ... + 2325.

2^1217025 is an apocalyptic number.

1217025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1217025 is a deficient number, since it is larger than the sum of its proper divisors (1041077).

1217025 is an equidigital number, since it uses as much as digits as its factorization.

1217025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1217025 is about 1103.1885604918. The cubic root of 1217025 is about 106.7660477860.

The spelling of 1217025 in words is "one million, two hundred seventeen thousand, twenty-five".