1245638 has 8 divisors (see below), whose sum is σ = 1880832. Its totient is φ = 618696.

The previous prime is 1245623. The next prime is 1245649. The reversal of 1245638 is 8365421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1245638² = 3103228054088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1245638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670 + ... + 2297.

It is an arithmetic number, because the mean of its divisors is an integer number (235104).

2^1245638 is an apocalyptic number.

1245638 is a deficient number, since it is larger than the sum of its proper divisors (635194).

1245638 is a wasteful number, since it uses less digits than its factorization.

1245638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126.

The product of its digits is 5760, while the sum is 29.

The square root of 1245638 is about 1116.0815382399. The cubic root of 1245638 is about 107.5962865456.

The spelling of 1245638 in words is "one million, two hundred forty-five thousand, six hundred thirty-eight".