1612945 has 4 divisors (see below), whose sum is σ = 1935540. Its totient is φ = 1290352.

The previous prime is 1612937. The next prime is 1612957. The reversal of 1612945 is 5492161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1149184 + 463761 = 1072^2 + 681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612945 - 2³ = 1612937 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161290 + ... + 161299.

It is an arithmetic number, because the mean of its divisors is an integer number (483885).

2^1612945 is an apocalyptic number.

It is an amenable number.

1612945 is a deficient number, since it is larger than the sum of its proper divisors (322595).

1612945 is an equidigital number, since it uses as much as digits as its factorization.

1612945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322594.

The product of its digits is 2160, while the sum is 28.

The square root of 1612945 is about 1270.0177164119. The cubic root of 1612945 is about 117.2752910741.

The spelling of 1612945 in words is "one million, six hundred twelve thousand, nine hundred forty-five".