1350021 has 16 divisors (see below), whose sum is σ = 1931904. Its totient is φ = 835584.

The previous prime is 1350017. The next prime is 1350023. The reversal of 1350021 is 1200531.

1350021 = T₃₉₀ + T₃₉₁ + ... + T₄₀₆.

1350021 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 1350021 - 2² = 1350017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1349979 and 1350006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1350023) 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, 5125 + ... + 5381.

It is an arithmetic number, because the mean of its divisors is an integer number (120744).

2^1350021 is an apocalyptic number.

It is an amenable number.

1350021 is a deficient number, since it is larger than the sum of its proper divisors (581883).

1350021 is a wasteful number, since it uses less digits than its factorization.

1350021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 1350021 is about 1161.9040407882. The cubic root of 1350021 is about 110.5215180278.

Adding to 1350021 its reverse (1200531), we get a palindrome (2550552).

The spelling of 1350021 in words is "one million, three hundred fifty thousand, twenty-one".