2545391 has 4 divisors (see below), whose sum is σ = 2555784. Its totient is φ = 2535000.

The previous prime is 2545369. The next prime is 2545429. The reversal of 2545391 is 1935452.

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

It is a cyclic number.

It is not a de Polignac number, because 2545391 - 2⁶ = 2545327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545691) 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, 4820 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (638946).

2^2545391 is an apocalyptic number.

2545391 is a deficient number, since it is larger than the sum of its proper divisors (10393).

2545391 is a wasteful number, since it uses less digits than its factorization.

2545391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392.

The product of its digits is 5400, while the sum is 29.

The square root of 2545391 is about 1595.4281556999. The cubic root of 2545391 is about 136.5373600143.

The spelling of 2545391 in words is "two million, five hundred forty-five thousand, three hundred ninety-one".