1245105 has 32 divisors (see below), whose sum is σ = 2315520. Its totient is φ = 633600.

The previous prime is 1245103. The next prime is 1245113. The reversal of 1245105 is 5015421.

It is not a de Polignac number, because 1245105 - 2¹ = 1245103 is a prime.

It is a super-2 number, since 2×1245105² = 3100572922050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2905 + ... + 3305.

It is an arithmetic number, because the mean of its divisors is an integer number (72360).

2^1245105 is an apocalyptic number.

1245105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1245105 is a deficient number, since it is larger than the sum of its proper divisors (1070415).

1245105 is a wasteful number, since it uses less digits than its factorization.

1245105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1245105 is about 1115.8427308541. The cubic root of 1245105 is about 107.5809377839.

The spelling of 1245105 in words is "one million, two hundred forty-five thousand, one hundred five".