1337921 has 8 divisors (see below), whose sum is σ = 1457064. Its totient is φ = 1221120.

The previous prime is 1337911. The next prime is 1337969. The reversal of 1337921 is 1297331.

It can be written as a sum of positive squares in 4 ways, for example, as 83521 + 1254400 = 289^2 + 1120^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1337921 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 (1337911) 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, 731 + ... + 1791.

It is an arithmetic number, because the mean of its divisors is an integer number (182133).

2^1337921 is an apocalyptic number.

It is an amenable number.

1337921 is a deficient number, since it is larger than the sum of its proper divisors (119143).

1337921 is a wasteful number, since it uses less digits than its factorization.

1337921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171.

The product of its digits is 1134, while the sum is 26.

The square root of 1337921 is about 1156.6853504735. The cubic root of 1337921 is about 110.1903316386.

The spelling of 1337921 in words is "one million, three hundred thirty-seven thousand, nine hundred twenty-one".