1137921 has 4 divisors (see below), whose sum is σ = 1517232. Its totient is φ = 758612.

The previous prime is 1137919. The next prime is 1137937. The reversal of 1137921 is 1297311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1297311 = 3 ⋅432437.

It is a cyclic number.

It is not a de Polignac number, because 1137921 - 2¹ = 1137919 is a prime.

It is a D-number.

It is a Curzon number.

1137921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1137891 and 1137900.

It is not an unprimeable number, because it can be changed into a prime (1137911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189651 + ... + 189656.

It is an arithmetic number, because the mean of its divisors is an integer number (379308).

2^1137921 is an apocalyptic number.

It is an amenable number.

1137921 is a deficient number, since it is larger than the sum of its proper divisors (379311).

1137921 is an equidigital number, since it uses as much as digits as its factorization.

1137921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379310.

The product of its digits is 378, while the sum is 24.

The square root of 1137921 is about 1066.7337999707. The cubic root of 1137921 is about 104.4008506852.

The spelling of 1137921 in words is "one million, one hundred thirty-seven thousand, nine hundred twenty-one".