1242825 has 24 divisors (see below), whose sum is σ = 2092128. Its totient is φ = 650880.

The previous prime is 1242823. The next prime is 1242827. The reversal of 1242825 is 5282421.

It is an interprime number because it is at equal distance from previous prime (1242823) and next prime (1242827).

It is not a de Polignac number, because 1242825 - 2¹ = 1242823 is a prime.

It is a super-2 number, since 2×1242825² = 3089227961250, which contains 22 as substring.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1242795 and 1242804.

It is not an unprimeable number, because it can be changed into a prime (1242823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5362 + ... + 5588.

It is an arithmetic number, because the mean of its divisors is an integer number (87172).

2^1242825 is an apocalyptic number.

1242825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242825 is a deficient number, since it is larger than the sum of its proper divisors (849303).

1242825 is a wasteful number, since it uses less digits than its factorization.

1242825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 308 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 1242825 is about 1114.8206133724. The cubic root of 1242825 is about 107.5152313014.

The spelling of 1242825 in words is "one million, two hundred forty-two thousand, eight hundred twenty-five".