1920137 has 4 divisors (see below), whose sum is σ = 1956420. Its totient is φ = 1883856.

The previous prime is 1920101. The next prime is 1920143. The reversal of 1920137 is 7310291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7310291 = 29 ⋅252079.

It can be written as a sum of positive squares in 2 ways, for example, as 1207801 + 712336 = 1099^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920137 - 2⁸ = 1919881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920187) 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, 18062 + ... + 18167.

It is an arithmetic number, because the mean of its divisors is an integer number (489105).

2^1920137 is an apocalyptic number.

It is an amenable number.

1920137 is a deficient number, since it is larger than the sum of its proper divisors (36283).

1920137 is an equidigital number, since it uses as much as digits as its factorization.

1920137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36282.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1920137 is about 1385.6900807901. The cubic root of 1920137 is about 124.2922563543.

The spelling of 1920137 in words is "one million, nine hundred twenty thousand, one hundred thirty-seven".