1242065 has 12 divisors (see below), whose sum is σ = 1639092. Its totient is φ = 902880.

The previous prime is 1242061. The next prime is 1242067. The reversal of 1242065 is 5602421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 543169 + 698896 = 737^2 + 836^2 .

It is not a de Polignac number, because 1242065 - 2² = 1242061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (136591).

2^1242065 is an apocalyptic number.

It is an amenable number.

1242065 is a deficient number, since it is larger than the sum of its proper divisors (397027).

1242065 is a wasteful number, since it uses less digits than its factorization.

1242065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1242065 is about 1114.4796992319. The cubic root of 1242065 is about 107.4933112839.

Adding to 1242065 its reverse (5602421), we get a palindrome (6844486).

The spelling of 1242065 in words is "one million, two hundred forty-two thousand, sixty-five".