1973145 has 8 divisors (see below), whose sum is σ = 3157056. Its totient is φ = 1052336.

The previous prime is 1973143. The next prime is 1973149. The reversal of 1973145 is 5413791.

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

It is a cyclic number.

It is not a de Polignac number, because 1973145 - 2¹ = 1973143 is a prime.

It is a super-3 number, since 3×1973145³ = 23046143335695070875, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1973143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65757 + ... + 65786.

It is an arithmetic number, because the mean of its divisors is an integer number (394632).

2^1973145 is an apocalyptic number.

1973145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1973145 is a deficient number, since it is larger than the sum of its proper divisors (1183911).

1973145 is a wasteful number, since it uses less digits than its factorization.

1973145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131551.

The product of its digits is 3780, while the sum is 30.

The square root of 1973145 is about 1404.6867978307. The cubic root of 1973145 is about 125.4256423172.

The spelling of 1973145 in words is "one million, nine hundred seventy-three thousand, one hundred forty-five".