3547561 has 4 divisors (see below), whose sum is σ = 3556224. Its totient is φ = 3538900.

The previous prime is 3547553. The next prime is 3547567. The reversal of 3547561 is 1657453.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1657453 = 7 ⋅236779.

It is a cyclic number.

It is not a de Polignac number, because 3547561 - 2³ = 3547553 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 5 + 4³ + 7 + 5⁹ + 6² + 1 .

It is a Duffinian number.

3547561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3547567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3685 + ... + 4546.

It is an arithmetic number, because the mean of its divisors is an integer number (889056).

Almost surely, 2^3547561 is an apocalyptic number.

It is an amenable number.

3547561 is a deficient number, since it is larger than the sum of its proper divisors (8663).

3547561 is an equidigital number, since it uses as much as digits as its factorization.

3547561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662.

The product of its digits is 12600, while the sum is 31.

The square root of 3547561 is about 1883.4970135363. The cubic root of 3547561 is about 152.5140863097.

The spelling of 3547561 in words is "three million, five hundred forty-seven thousand, five hundred sixty-one".