1373021 has 8 divisors (see below), whose sum is σ = 1526784. Its totient is φ = 1226160.

The previous prime is 1372999. The next prime is 1373027. The reversal of 1373021 is 1203731.

1373021 = T₁₆ + T₁₇ + ... + T₂₀₁.

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

It is not a de Polignac number, because 1373021 - 2⁶ = 1372957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 2106.

It is an arithmetic number, because the mean of its divisors is an integer number (190848).

2^1373021 is an apocalyptic number.

It is an amenable number.

1373021 is a deficient number, since it is larger than the sum of its proper divisors (153763).

1373021 is a wasteful number, since it uses less digits than its factorization.

1373021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1373021 is about 1171.7597876698. The cubic root of 1373021 is about 111.1456303488.

Adding to 1373021 its reverse (1203731), we get a palindrome (2576752).

The spelling of 1373021 in words is "one million, three hundred seventy-three thousand, twenty-one".