1245142 has 4 divisors (see below), whose sum is σ = 1867716. Its totient is φ = 622570.

The previous prime is 1245137. The next prime is 1245149. The reversal of 1245142 is 2415421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2415421 = 313 ⋅7717.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311284 + ... + 311287.

It is an arithmetic number, because the mean of its divisors is an integer number (466929).

2^1245142 is an apocalyptic number.

1245142 is a deficient number, since it is larger than the sum of its proper divisors (622574).

1245142 is an equidigital number, since it uses as much as digits as its factorization.

1245142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622573.

The product of its digits is 320, while the sum is 19.

The square root of 1245142 is about 1115.8593101283. The cubic root of 1245142 is about 107.5820034117.

It can be divided in two parts, 12 and 45142, that added together give a palindrome (45154).

The spelling of 1245142 in words is "one million, two hundred forty-five thousand, one hundred forty-two".