2456389 has 4 divisors (see below), whose sum is σ = 2645356. Its totient is φ = 2267424.

The previous prime is 2456383. The next prime is 2456401. The reversal of 2456389 is 9836542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9836542 = 2 ⋅4918271.

It can be written as a sum of positive squares in 2 ways, for example, as 330625 + 2125764 = 575^2 + 1458^2 .

It is a cyclic number.

It is not a de Polignac number, because 2456389 - 2⁵ = 2456357 is a prime.

It is a d-powerful number, because it can be written as 2¹⁶ + 4⁵ + 5⁴ + 6⁴ + 3¹³ + 8⁶ + 9⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94464 + ... + 94489.

It is an arithmetic number, because the mean of its divisors is an integer number (661339).

2^2456389 is an apocalyptic number.

It is an amenable number.

2456389 is a deficient number, since it is larger than the sum of its proper divisors (188967).

2456389 is a wasteful number, since it uses less digits than its factorization.

2456389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188966.

The product of its digits is 51840, while the sum is 37.

The square root of 2456389 is about 1567.2871466327. The cubic root of 2456389 is about 134.9270570739.

The spelling of 2456389 in words is "two million, four hundred fifty-six thousand, three hundred eighty-nine".