1671745245 has 8 divisors (see below), whose sum is σ = 2674792416. Its totient is φ = 891597456.

The previous prime is 1671745237. The next prime is 1671745253. The reversal of 1671745245 is 5425471761.

It is an interprime number because it is at equal distance from previous prime (1671745237) and next prime (1671745253).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1671745245 - 2³ = 1671745237 is a prime.

It is a super-2 number, since 2×1671745245² = 5589464328360220050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1671745197 and 1671745206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55724827 + ... + 55724856.

It is an arithmetic number, because the mean of its divisors is an integer number (334349052).

Almost surely, 2^1671745245 is an apocalyptic number.

1671745245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1671745245 is a deficient number, since it is larger than the sum of its proper divisors (1003047171).

1671745245 is a wasteful number, since it uses less digits than its factorization.

1671745245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111449691.

The product of its digits is 235200, while the sum is 42.

The square root of 1671745245 is about 40886.9813632653. The cubic root of 1671745245 is about 1186.8341444580.

The spelling of 1671745245 in words is "one billion, six hundred seventy-one million, seven hundred forty-five thousand, two hundred forty-five".