1242955 has 16 divisors (see below), whose sum is σ = 1805760. Its totient is φ = 801792.

The previous prime is 1242947. The next prime is 1242959. The reversal of 1242955 is 5592421.

It is a cyclic number.

It is not a de Polignac number, because 1242955 - 2³ = 1242947 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1242959) 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 15 ways as a sum of consecutive naturals, for example, 450 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2^1242955 is an apocalyptic number.

1242955 is a deficient number, since it is larger than the sum of its proper divisors (562805).

1242955 is a wasteful number, since it uses less digits than its factorization.

1242955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118.

The product of its digits is 3600, while the sum is 28.

The square root of 1242955 is about 1114.8789171924. The cubic root of 1242955 is about 107.5189798830.

It can be divided in two parts, 1242 and 955, that added together give a cube (2197 = 13³).

The spelling of 1242955 in words is "one million, two hundred forty-two thousand, nine hundred fifty-five".