1242502052421 has 16 divisors (see below), whose sum is σ = 1894707494528. Its totient is φ = 709487035200.

The previous prime is 1242502052369. The next prime is 1242502052423.

1242502052421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1242502052421 - 2⁷ = 1242502052293 is a prime.

It is a super-2 number, since 2×1242502052421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242502052423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21392710 + ... + 21450711.

It is an arithmetic number, because the mean of its divisors is an integer number (118419218408).

Almost surely, 2^{1242502052421} is an apocalyptic number.

It is an amenable number.

1242502052421 is a deficient number, since it is larger than the sum of its proper divisors (652205442107).

1242502052421 is a wasteful number, since it uses less digits than its factorization.

1242502052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42844812.

The product of its (nonzero) digits is 12800, while the sum is 30.

The spelling of 1242502052421 in words is "one trillion, two hundred forty-two billion, five hundred two million, fifty-two thousand, four hundred twenty-one".