1242625465 has 4 divisors (see below), whose sum is σ = 1491150564. Its totient is φ = 994100368.

The previous prime is 1242625429. The next prime is 1242625487. The reversal of 1242625465 is 5645262421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 378030249 + 864595216 = 19443^2 + 29404^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242625465 - 2¹³ = 1242617273 is a prime.

It is a Duffinian 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, 124262542 + ... + 124262551.

It is an arithmetic number, because the mean of its divisors is an integer number (372787641).

Almost surely, 2^1242625465 is an apocalyptic number.

It is an amenable number.

1242625465 is a deficient number, since it is larger than the sum of its proper divisors (248525099).

1242625465 is an equidigital number, since it uses as much as digits as its factorization.

1242625465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248525098.

The product of its digits is 115200, while the sum is 37.

The square root of 1242625465 is about 35250.8931092533. The cubic root of 1242625465 is about 1075.0947715258.

Adding to 1242625465 its reverse (5645262421), we get a palindrome (6887887886).

The spelling of 1242625465 in words is "one billion, two hundred forty-two million, six hundred twenty-five thousand, four hundred sixty-five".