1513281 has 16 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 786000.

The previous prime is 1513277. The next prime is 1513319. The reversal of 1513281 is 1823151.

It is not a de Polignac number, because 1513281 - 2² = 1513277 is a prime.

It is a super-2 number, since 2×1513281² = 4580038769922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1513271) 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, 3045 + ... + 3506.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2^1513281 is an apocalyptic number.

1513281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1513281 is a deficient number, since it is larger than the sum of its proper divisors (1002687).

1513281 is a wasteful number, since it uses less digits than its factorization.

1513281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572.

The product of its digits is 240, while the sum is 21.

The square root of 1513281 is about 1230.1548682991. The cubic root of 1513281 is about 114.8082753730.

The spelling of 1513281 in words is "one million, five hundred thirteen thousand, two hundred eighty-one".