1142455 has 8 divisors (see below), whose sum is σ = 1418400. Its totient is φ = 882336.

The previous prime is 1142431. The next prime is 1142473. The reversal of 1142455 is 5542411.

1142455 = T₁₆ + T₁₇ + ... + T₁₈₉.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1142455 - 2⁵ = 1142423 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3795 + ... + 4084.

It is an arithmetic number, because the mean of its divisors is an integer number (177300).

2^1142455 is an apocalyptic number.

1142455 is a deficient number, since it is larger than the sum of its proper divisors (275945).

1142455 is an equidigital number, since it uses as much as digits as its factorization.

1142455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913.

The product of its digits is 800, while the sum is 22.

The square root of 1142455 is about 1068.8568660022. The cubic root of 1142455 is about 104.5393272459.

Adding to 1142455 its reverse (5542411), we get a palindrome (6684866).

The spelling of 1142455 in words is "one million, one hundred forty-two thousand, four hundred fifty-five".