1025647 has 4 divisors (see below), whose sum is σ = 1172176. Its totient is φ = 879120.

The previous prime is 1025641. The next prime is 1025653. The reversal of 1025647 is 7465201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7465201 = 947 ⋅7883.

It is an interprime number because it is at equal distance from previous prime (1025641) and next prime (1025653).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025647 is a prime.

It is a Duffinian number.

1025647 is a lucky number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025641) 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, 73254 + ... + 73267.

It is an arithmetic number, because the mean of its divisors is an integer number (293044).

2^1025647 is an apocalyptic number.

1025647 is a deficient number, since it is larger than the sum of its proper divisors (146529).

1025647 is an equidigital number, since it uses as much as digits as its factorization.

1025647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146528.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1025647 is about 1012.7423166828. The cubic root of 1025647 is about 100.8476938468.

The spelling of 1025647 in words is "one million, twenty-five thousand, six hundred forty-seven".