1536981 has 8 divisors (see below), whose sum is σ = 2055264. Its totient is φ = 1021680.

The previous prime is 1536961. The next prime is 1536989. The reversal of 1536981 is 1896351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1536981 - 2¹³ = 1528789 is a prime.

It is a super-2 number, since 2×1536981² = 4724621188722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1536989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150 + ... + 2096.

It is an arithmetic number, because the mean of its divisors is an integer number (256908).

2^1536981 is an apocalyptic number.

It is an amenable number.

1536981 is a deficient number, since it is larger than the sum of its proper divisors (518283).

1536981 is an equidigital number, since it uses as much as digits as its factorization.

1536981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its digits is 6480, while the sum is 33.

The square root of 1536981 is about 1239.7503781004. The cubic root of 1536981 is about 115.4045237101.

The spelling of 1536981 in words is "one million, five hundred thirty-six thousand, nine hundred eighty-one".