2142455 has 16 divisors (see below), whose sum is σ = 3011904. Its totient is φ = 1432320.

The previous prime is 2142449. The next prime is 2142457. The reversal of 2142455 is 5542412.

It is a happy number.

2142455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2142455 is a prime.

It is a super-2 number, since 2×2142455² = 9180226854050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2142455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (188244).

2^2142455 is an apocalyptic number.

2142455 is a deficient number, since it is larger than the sum of its proper divisors (869449).

2142455 is a wasteful number, since it uses less digits than its factorization.

2142455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its digits is 1600, while the sum is 23.

The square root of 2142455 is about 1463.7127450426. The cubic root of 2142455 is about 128.9151335720.

Adding to 2142455 its reverse (5542412), we get a palindrome (7684867).

It can be divided in two parts, 214245 and 5, that multiplied together give a square (1071225 = 1035²).

The spelling of 2142455 in words is "two million, one hundred forty-two thousand, four hundred fifty-five".