1671478425 has 72 divisors (see below), whose sum is σ = 3143709504. Its totient is φ = 847313280.

The previous prime is 1671478421. The next prime is 1671478433. The reversal of 1671478425 is 5248741761.

It is not a de Polignac number, because 1671478425 - 2² = 1671478421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671478421) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 894342 + ... + 896208.

It is an arithmetic number, because the mean of its divisors is an integer number (43662632).

Almost surely, 2^1671478425 is an apocalyptic number.

1671478425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1671478425 is a deficient number, since it is larger than the sum of its proper divisors (1472231079).

1671478425 is a wasteful number, since it uses less digits than its factorization.

1671478425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079 (or 2071 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 1671478425 is about 40883.7183362766. The cubic root of 1671478425 is about 1186.7709992835.

The spelling of 1671478425 in words is "one billion, six hundred seventy-one million, four hundred seventy-eight thousand, four hundred twenty-five".