1025561471 has 4 divisors (see below), whose sum is σ = 1118794344. Its totient is φ = 932328600.

The previous prime is 1025561443. The next prime is 1025561477. The reversal of 1025561471 is 1741655201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025561471 is a prime.

It is a super-3 number, since 3×1025561471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025561477) 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, 46616420 + ... + 46616441.

It is an arithmetic number, because the mean of its divisors is an integer number (279698586).

Almost surely, 2^1025561471 is an apocalyptic number.

1025561471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1025561471 is a deficient number, since it is larger than the sum of its proper divisors (93232873).

1025561471 is an equidigital number, since it uses as much as digits as its factorization.

1025561471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93232872.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1025561471 is about 32024.3886904965. The cubic root of 1025561471 is about 1008.4489052938.

The spelling of 1025561471 in words is "one billion, twenty-five million, five hundred sixty-one thousand, four hundred seventy-one".