1242397465 has 8 divisors (see below), whose sum is σ = 1505638728. Its totient is φ = 984076800.

The previous prime is 1242397459. The next prime is 1242397469. The reversal of 1242397465 is 5647932421.

It can be written as a sum of positive squares in 4 ways, for example, as 92102409 + 1150295056 = 9597^2 + 33916^2 .

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

It is not a de Polignac number, because 1242397465 - 2¹³ = 1242389273 is a prime.

It is a super-2 number, since 2×1242397465² = 3087102922076852450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242397469) 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, 1229592 + ... + 1230601.

It is an arithmetic number, because the mean of its divisors is an integer number (188204841).

Almost surely, 2^1242397465 is an apocalyptic number.

It is an amenable number.

1242397465 is a deficient number, since it is larger than the sum of its proper divisors (263241263).

1242397465 is a wasteful number, since it uses less digits than its factorization.

1242397465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460299.

The product of its digits is 362880, while the sum is 43.

The square root of 1242397465 is about 35247.6590002797. The cubic root of 1242397465 is about 1075.0290138194.

The spelling of 1242397465 in words is "one billion, two hundred forty-two million, three hundred ninety-seven thousand, four hundred sixty-five".