1539481 has 4 divisors (see below), whose sum is σ = 1544464. Its totient is φ = 1534500.

The previous prime is 1539479. The next prime is 1539521. The reversal of 1539481 is 1849351.

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.

It is a cyclic number.

It is not a de Polignac number, because 1539481 - 2¹ = 1539479 is a prime.

It is a super-2 number, since 2×1539481² = 4740003498722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1539451) 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, 1995 + ... + 2656.

It is an arithmetic number, because the mean of its divisors is an integer number (386116).

2^1539481 is an apocalyptic number.

It is an amenable number.

1539481 is a deficient number, since it is larger than the sum of its proper divisors (4983).

1539481 is an equidigital number, since it uses as much as digits as its factorization.

1539481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982.

The product of its digits is 4320, while the sum is 31.

The square root of 1539481 is about 1240.7582359187. The cubic root of 1539481 is about 115.4670608144.

The spelling of 1539481 in words is "one million, five hundred thirty-nine thousand, four hundred eighty-one".