1924921 has 2 divisors, whose sum is σ = 1924922. Its totient is φ = 1924920.

The previous prime is 1924903. The next prime is 1924957. The reversal of 1924921 is 1294291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1354896 + 570025 = 1164^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1924921 - 2⁵ = 1924889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1924921.

It is not a weakly prime, because it can be changed into another prime (1924721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962460 + 962461.

It is an arithmetic number, because the mean of its divisors is an integer number (962461).

2^1924921 is an apocalyptic number.

It is an amenable number.

1924921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1924921 is an equidigital number, since it uses as much as digits as its factorization.

1924921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 1924921 is about 1387.4152226352. The cubic root of 1924921 is about 124.3953950040.

The spelling of 1924921 in words is "one million, nine hundred twenty-four thousand, nine hundred twenty-one".