1025509447 has 4 divisors (see below), whose sum is σ = 1031801080. Its totient is φ = 1019217816.

The previous prime is 1025509423. The next prime is 1025509493. The reversal of 1025509447 is 7449055201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7449055201 = 7 ⋅1064150743.

It is a cyclic number.

It is not a de Polignac number, because 1025509447 - 2²⁷ = 891291719 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 (1025509847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3145572 + ... + 3145897.

It is an arithmetic number, because the mean of its divisors is an integer number (257950270).

Almost surely, 2^1025509447 is an apocalyptic number.

1025509447 is a deficient number, since it is larger than the sum of its proper divisors (6291633).

1025509447 is an equidigital number, since it uses as much as digits as its factorization.

1025509447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291632.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1025509447 is about 32023.5764242534. The cubic root of 1025509447 is about 1008.4318530304.

The spelling of 1025509447 in words is "one billion, twenty-five million, five hundred nine thousand, four hundred forty-seven".