1242425 has 6 divisors (see below), whose sum is σ = 1540638. Its totient is φ = 993920.

The previous prime is 1242421. The next prime is 1242457. The reversal of 1242425 is 5242421.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12544 + 1229881 = 112^2 + 1109^2 .

It is not a de Polignac number, because 1242425 - 2² = 1242421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242397 and 1242406.

It is not an unprimeable number, because it can be changed into a prime (1242421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24824 + ... + 24873.

It is an arithmetic number, because the mean of its divisors is an integer number (256773).

2^1242425 is an apocalyptic number.

It is an amenable number.

1242425 is a deficient number, since it is larger than the sum of its proper divisors (298213).

1242425 is an equidigital number, since it uses as much as digits as its factorization.

1242425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49707 (or 49702 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 1242425 is about 1114.6411978749. The cubic root of 1242425 is about 107.5036955643.

Adding to 1242425 its reverse (5242421), we get a palindrome (6484846).

It can be divided in two parts, 124 and 2425, that multiplied together give a triangular number (300700 = T₇₇₅).

The spelling of 1242425 in words is "one million, two hundred forty-two thousand, four hundred twenty-five".