1573641 has 16 divisors (see below), whose sum is σ = 2352000. Its totient is φ = 1039824.

The previous prime is 1573613. The next prime is 1573643. The reversal of 1573641 is 1463751.

1573641 is a `hidden beast` number, since 15 + 7 + 3 + 641 = 666.

It is not a de Polignac number, because 1573641 - 2⁶ = 1573577 is a prime.

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

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1573643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4335 + ... + 4683.

It is an arithmetic number, because the mean of its divisors is an integer number (147000).

2^1573641 is an apocalyptic number.

It is an amenable number.

1573641 is a deficient number, since it is larger than the sum of its proper divisors (778359).

1573641 is a wasteful number, since it uses less digits than its factorization.

1573641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 519 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1573641 is about 1254.4484843946. The cubic root of 1573641 is about 116.3148649447.

The spelling of 1573641 in words is "one million, five hundred seventy-three thousand, six hundred forty-one".