1242820640264 has 24 divisors (see below), whose sum is σ = 2710743999390. Its totient is φ = 532637417088.

The previous prime is 1242820640261. The next prime is 1242820640267. The reversal of 1242820640264 is 4620460282421.

It is an interprime number because it is at equal distance from previous prime (1242820640261) and next prime (1242820640267).

It can be written as a sum of positive squares in only one way, i.e., 870283752100 + 372536888164 = 932890^2 + 610358^2 .

It is not an unprimeable number, because it can be changed into a prime (1242820640261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1585230017 + ... + 1585230800.

Almost surely, 2^{1242820640264} is an apocalyptic number.

1242820640264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1242820640264 is an abundant number, since it is smaller than the sum of its proper divisors (1467923359126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242820640264 is a wasteful number, since it uses less digits than its factorization.

1242820640264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170460837 (or 3170460826 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 41.

The spelling of 1242820640264 in words is "one trillion, two hundred forty-two billion, eight hundred twenty million, six hundred forty thousand, two hundred sixty-four".