2457947 has 4 divisors (see below), whose sum is σ = 2524416. Its totient is φ = 2391480.

The previous prime is 2457943. The next prime is 2457967. The reversal of 2457947 is 7497542.

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 2457947 - 2² = 2457943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2457947.

It is not an unprimeable number, because it can be changed into a prime (2457943) 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, 33179 + ... + 33252.

It is an arithmetic number, because the mean of its divisors is an integer number (631104).

2^2457947 is an apocalyptic number.

2457947 is a deficient number, since it is larger than the sum of its proper divisors (66469).

2457947 is an equidigital number, since it uses as much as digits as its factorization.

2457947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66468.

The product of its digits is 70560, while the sum is 38.

The square root of 2457947 is about 1567.7841050349. The cubic root of 2457947 is about 134.9555775195.

It can be divided in two parts, 245 and 7947, that added together give a 13-th power (8192 = 2¹³).

The spelling of 2457947 in words is "two million, four hundred fifty-seven thousand, nine hundred forty-seven".