1491541 has 4 divisors (see below), whose sum is σ = 1526272. Its totient is φ = 1456812.

The previous prime is 1491521. The next prime is 1491547. The reversal of 1491541 is 1451941.

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: 1451941 = 79 ⋅18379.

It is a cyclic number.

It is not a de Polignac number, because 1491541 - 2⁵ = 1491509 is a prime.

It is a Duffinian number.

1491541 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491547) 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, 17301 + ... + 17386.

It is an arithmetic number, because the mean of its divisors is an integer number (381568).

2^1491541 is an apocalyptic number.

It is an amenable number.

1491541 is a deficient number, since it is larger than the sum of its proper divisors (34731).

1491541 is an equidigital number, since it uses as much as digits as its factorization.

1491541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34730.

The product of its digits is 720, while the sum is 25.

The square root of 1491541 is about 1221.2866166466. The cubic root of 1491541 is about 114.2558376516.

The spelling of 1491541 in words is "one million, four hundred ninety-one thousand, five hundred forty-one".