1245623 has 2 divisors, whose sum is σ = 1245624. Its totient is φ = 1245622.

The previous prime is 1245619. The next prime is 1245649. The reversal of 1245623 is 3265421.

1245623 is nontrivially palindromic in base 3.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1245623 - 2² = 1245619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622811 + 622812.

It is an arithmetic number, because the mean of its divisors is an integer number (622812).

2^1245623 is an apocalyptic number.

1245623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245623 is an equidigital number, since it uses as much as digits as its factorization.

1245623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 1245623 is about 1116.0748182806. The cubic root of 1245623 is about 107.5958546516.

It can be divided in two parts, 1245 and 623, that multiplied together give a triangular number (775635 = T₁₂₄₅).

The spelling of 1245623 in words is "one million, two hundred forty-five thousand, six hundred twenty-three".