1242013 has 4 divisors (see below), whose sum is σ = 1272348. Its totient is φ = 1211680.

The previous prime is 1242001. The next prime is 1242029. The reversal of 1242013 is 3102421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3102421 = 7 ⋅443203.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 994009 = 498^2 + 997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1241984 and 1242002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15106 + ... + 15187.

It is an arithmetic number, because the mean of its divisors is an integer number (318087).

2^1242013 is an apocalyptic number.

It is an amenable number.

1242013 is a deficient number, since it is larger than the sum of its proper divisors (30335).

1242013 is an equidigital number, since it uses as much as digits as its factorization.

1242013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30334.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1242013 is about 1114.4563697157. The cubic root of 1242013 is about 107.4918111664.

Adding to 1242013 its reverse (3102421), we get a palindrome (4344434).

It can be divided in two parts, 12 and 42013, that added together give a square (42025 = 205²).

The spelling of 1242013 in words is "one million, two hundred forty-two thousand, thirteen".