1906545 has 8 divisors (see below), whose sum is σ = 3050496. Its totient is φ = 1016816.

The previous prime is 1906543. The next prime is 1906559. The reversal of 1906545 is 5456091.

1906545 is nontrivially palindromic in base 9.

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 1906545 - 2¹ = 1906543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1906543) 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, 63537 + ... + 63566.

It is an arithmetic number, because the mean of its divisors is an integer number (381312).

2^1906545 is an apocalyptic number.

1906545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1906545 is a deficient number, since it is larger than the sum of its proper divisors (1143951).

1906545 is a wasteful number, since it uses less digits than its factorization.

1906545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127111.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1906545 is about 1380.7769551959. The cubic root of 1906545 is about 123.9982873506.

It can be divided in two parts, 19065 and 45, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 1906545 in words is "one million, nine hundred six thousand, five hundred forty-five".