1245408 has 24 divisors (see below), whose sum is σ = 3269448. Its totient is φ = 415104.

The previous prime is 1245401. The next prime is 1245421. The reversal of 1245408 is 8045421.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245401) 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, 6391 + ... + 6582.

It is an arithmetic number, because the mean of its divisors is an integer number (136227).

2^1245408 is an apocalyptic number.

It is an amenable number.

1245408 is an abundant number, since it is smaller than the sum of its proper divisors (2024040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245408 is a wasteful number, since it uses less digits than its factorization.

1245408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12986 (or 12978 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1245408 is about 1115.9784944164. The cubic root of 1245408 is about 107.5896637897.

It can be divided in two parts, 1245 and 408, that added together give a triangular number (1653 = T₅₇).

The spelling of 1245408 in words is "one million, two hundred forty-five thousand, four hundred eight".