1642545 has 32 divisors (see below), whose sum is σ = 3052800. Its totient is φ = 837936.

The previous prime is 1642519. The next prime is 1642549. The reversal of 1642545 is 5452461.

It is not a de Polignac number, because 1642545 - 2⁵ = 1642513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1642549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71404 + ... + 71426.

It is an arithmetic number, because the mean of its divisors is an integer number (95400).

2^1642545 is an apocalyptic number.

1642545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642545 is a deficient number, since it is larger than the sum of its proper divisors (1410255).

1642545 is an frugal number, since it uses more digits than its factorization.

1642545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 31 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1642545 is about 1281.6181178495. The cubic root of 1642545 is about 117.9883403207.

It can be divided in two parts, 1642 and 545, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1642545 in words is "one million, six hundred forty-two thousand, five hundred forty-five".