1523413 has 4 divisors (see below), whose sum is σ = 1540620. Its totient is φ = 1506208.

The previous prime is 1523407. The next prime is 1523419. The reversal of 1523413 is 3143251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3143251 = 103 ⋅30517.

It is an interprime number because it is at equal distance from previous prime (1523407) and next prime (1523419).

It can be written as a sum of positive squares in 2 ways, for example, as 88209 + 1435204 = 297^2 + 1198^2 .

It is a cyclic number.

It is not a de Polignac number, because 1523413 - 2⁵ = 1523381 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 (1523419) 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, 8470 + ... + 8647.

It is an arithmetic number, because the mean of its divisors is an integer number (385155).

2^1523413 is an apocalyptic number.

It is an amenable number.

1523413 is a deficient number, since it is larger than the sum of its proper divisors (17207).

1523413 is an equidigital number, since it uses as much as digits as its factorization.

1523413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17206.

The product of its digits is 360, while the sum is 19.

The square root of 1523413 is about 1234.2661787475. The cubic root of 1523413 is about 115.0639342035.

Adding to 1523413 its reverse (3143251), we get a palindrome (4666664).

It can be divided in two parts, 1523 and 413, that added together give a square (1936 = 44²).

The spelling of 1523413 in words is "one million, five hundred twenty-three thousand, four hundred thirteen".