2126378 has 4 divisors (see below), whose sum is σ = 3189570. Its totient is φ = 1063188.

The previous prime is 2126363. The next prime is 2126381. The reversal of 2126378 is 8736212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 717409 = 1187^2 + 847^2 .

It is a Curzon number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2126378.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 531593 + ... + 531596.

2^2126378 is an apocalyptic number.

2126378 is a deficient number, since it is larger than the sum of its proper divisors (1063192).

2126378 is a wasteful number, since it uses less digits than its factorization.

2126378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063191.

The product of its digits is 4032, while the sum is 29.

The square root of 2126378 is about 1458.2105472119. The cubic root of 2126378 is about 128.5918635362.

The spelling of 2126378 in words is "two million, one hundred twenty-six thousand, three hundred seventy-eight".