1245123 has 12 divisors (see below), whose sum is σ = 1962168. Its totient is φ = 754560.

The previous prime is 1245121. The next prime is 1245137. The reversal of 1245123 is 3215421.

Added to its reverse (3215421) it gives a square (4460544 = 2112²).

It is not a de Polignac number, because 1245123 - 2¹ = 1245121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1245096 and 1245105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6190 + ... + 6387.

It is an arithmetic number, because the mean of its divisors is an integer number (163514).

2^1245123 is an apocalyptic number.

1245123 is a deficient number, since it is larger than the sum of its proper divisors (717045).

1245123 is a wasteful number, since it uses less digits than its factorization.

1245123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12594 (or 12591 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1245123 is about 1115.8507964777. The cubic root of 1245123 is about 107.5814562001.

Adding to 1245123 its reverse (3215421), we get a square (4460544 = 2112²).

The spelling of 1245123 in words is "one million, two hundred forty-five thousand, one hundred twenty-three".