1945541 has 8 divisors (see below), whose sum is σ = 2115960. Its totient is φ = 1778112.

The previous prime is 1945519. The next prime is 1945549. The reversal of 1945541 is 1455491.

It can be written as a sum of positive squares in 4 ways, for example, as 688900 + 1256641 = 830^2 + 1121^2 .

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 1945541 - 2¹⁴ = 1929157 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945549) 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, 731 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (264495).

2^1945541 is an apocalyptic number.

It is an amenable number.

1945541 is a deficient number, since it is larger than the sum of its proper divisors (170419).

1945541 is a wasteful number, since it uses less digits than its factorization.

1945541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495.

The product of its digits is 3600, while the sum is 29.

The square root of 1945541 is about 1394.8265125097. The cubic root of 1945541 is about 124.8379981339.

The spelling of 1945541 in words is "one million, nine hundred forty-five thousand, five hundred forty-one".