1520423 has 2 divisors, whose sum is σ = 1520424. Its totient is φ = 1520422.

The previous prime is 1520417. The next prime is 1520443. The reversal of 1520423 is 3240251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1520423 - 2⁶ = 1520359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760211 + 760212.

It is an arithmetic number, because the mean of its divisors is an integer number (760212).

2^1520423 is an apocalyptic number.

1520423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520423 is an equidigital number, since it uses as much as digits as its factorization.

1520423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1520423 is about 1233.0543378132. The cubic root of 1520423 is about 114.9886063066.

Adding to 1520423 its reverse (3240251), we get a palindrome (4760674).

The spelling of 1520423 in words is "one million, five hundred twenty thousand, four hundred twenty-three".