1242465 has 16 divisors (see below), whose sum is σ = 2272128. Its totient is φ = 567936.

The previous prime is 1242457. The next prime is 1242487. The reversal of 1242465 is 5642421.

It is not a de Polignac number, because 1242465 - 2³ = 1242457 is a prime.

It is an Ulam number.

It is a Curzon number.

1242465 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5812 + ... + 6021.

It is an arithmetic number, because the mean of its divisors is an integer number (142008).

2^1242465 is an apocalyptic number.

1242465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242465 is a deficient number, since it is larger than the sum of its proper divisors (1029663).

1242465 is a wasteful number, since it uses less digits than its factorization.

1242465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11848.

The product of its digits is 1920, while the sum is 24.

The square root of 1242465 is about 1114.6591407242. The cubic root of 1242465 is about 107.5048492494.

Adding to 1242465 its reverse (5642421), we get a palindrome (6884886).

It can be divided in two parts, 124246 and 5, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 1242465 in words is "one million, two hundred forty-two thousand, four hundred sixty-five".