1613945 has 8 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 1269040.

The previous prime is 1613921. The next prime is 1613947. The reversal of 1613945 is 5493161.

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

It is not a de Polignac number, because 1613945 - 2¹⁶ = 1548409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1613947) 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, 2441 + ... + 3030.

It is an arithmetic number, because the mean of its divisors is an integer number (246240).

2^1613945 is an apocalyptic number.

It is an amenable number.

1613945 is a deficient number, since it is larger than the sum of its proper divisors (355975).

1613945 is an equidigital number, since it uses as much as digits as its factorization.

1613945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its digits is 3240, while the sum is 29.

The square root of 1613945 is about 1270.4113507050. The cubic root of 1613945 is about 117.2995223329.

The spelling of 1613945 in words is "one million, six hundred thirteen thousand, nine hundred forty-five".