1245638479 has 8 divisors (see below), whose sum is σ = 1298741760. Its totient is φ = 1193211936.

The previous prime is 1245638377. The next prime is 1245638533. The reversal of 1245638479 is 9748365421.

It is a happy number.

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 1245638479 - 2¹⁹ = 1245114191 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 (1245638279) 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, 165424 + ... + 172789.

It is an arithmetic number, because the mean of its divisors is an integer number (162342720).

Almost surely, 2^1245638479 is an apocalyptic number.

1245638479 is a deficient number, since it is larger than the sum of its proper divisors (53103281).

1245638479 is a wasteful number, since it uses less digits than its factorization.

1245638479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338369.

The product of its digits is 1451520, while the sum is 49.

The square root of 1245638479 is about 35293.6039389576. The cubic root of 1245638479 is about 1075.9630033736.

The spelling of 1245638479 in words is "one billion, two hundred forty-five million, six hundred thirty-eight thousand, four hundred seventy-nine".