1351521 has 6 divisors (see below), whose sum is σ = 1952210. Its totient is φ = 901008.

The previous prime is 1351459. The next prime is 1351523. The reversal of 1351521 is 1251531.

It can be written as a sum of positive squares in only one way, i.e., 1347921 + 3600 = 1161^2 + 60^2 .

It is not a de Polignac number, because 1351521 - 2¹¹ = 1349473 is a prime.

It is a Duffinian number.

1351521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1351494 and 1351503.

It is not an unprimeable number, because it can be changed into a prime (1351523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75076 + ... + 75093.

2^1351521 is an apocalyptic number.

It is an amenable number.

1351521 is a deficient number, since it is larger than the sum of its proper divisors (600689).

1351521 is a wasteful number, since it uses less digits than its factorization.

1351521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150175 (or 150172 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1351521 is about 1162.5493537911. The cubic root of 1351521 is about 110.5624361358.

The spelling of 1351521 in words is "one million, three hundred fifty-one thousand, five hundred twenty-one".