1245455 has 8 divisors (see below), whose sum is σ = 1502592. Its totient is φ = 991008.

The previous prime is 1245451. The next prime is 1245479. The reversal of 1245455 is 5545421.

It is a Cunningham number, because it is equal to 1116²-1.

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

It is a cyclic number.

It is not a de Polignac number, because 1245455 - 2² = 1245451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (187824).

2^1245455 is an apocalyptic number.

1245455 is a deficient number, since it is larger than the sum of its proper divisors (257137).

1245455 is a wasteful number, since it uses less digits than its factorization.

1245455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345.

The product of its digits is 4000, while the sum is 26.

The square root of 1245455 is about 1115.9995519712. Note that the first 3 decimals coincide. The cubic root of 1245455 is about 107.5910172018.

The spelling of 1245455 in words is "one million, two hundred forty-five thousand, four hundred fifty-five".