2251078 has 4 divisors (see below), whose sum is σ = 3376620. Its totient is φ = 1125538.

The previous prime is 2251061. The next prime is 2251099. The reversal of 2251078 is 8701522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8701522 = 2 ⋅4350761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562768 + ... + 562771.

It is an arithmetic number, because the mean of its divisors is an integer number (844155).

2^2251078 is an apocalyptic number.

2251078 is a deficient number, since it is larger than the sum of its proper divisors (1125542).

2251078 is a wasteful number, since it uses less digits than its factorization.

2251078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125541.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2251078 is about 1500.3592903035. The cubic root of 2251078 is about 131.0579934746.

The spelling of 2251078 in words is "two million, two hundred fifty-one thousand, seventy-eight".