2542120926409 has 3 divisors (see below), whose sum is σ = 2542122520813. Its totient is φ = 2542119332006.

The previous prime is 2542120926391. The next prime is 2542120926431. The reversal of 2542120926409 is 9046290212452.

The square root of 2542120926409 is 1594403.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2542120926409 - 2¹⁹ = 2542120402121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542120926509) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 797202 + ... + 2391604.

Almost surely, 2^{2542120926409} is an apocalyptic number.

2542120926409 is the 1594403-rd square number.

2542120926409 is the 797202-nd centered octagonal number.

It is an amenable number.

2542120926409 is a deficient number, since it is larger than the sum of its proper divisors (1594404).

2542120926409 is an frugal number, since it uses more digits than its factorization.

2542120926409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188806 (or 1594403 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 2542120926409 in words is "two trillion, five hundred forty-two billion, one hundred twenty million, nine hundred twenty-six thousand, four hundred nine".