1242100534 has 4 divisors (see below), whose sum is σ = 1863150804. Its totient is φ = 621050266.

The previous prime is 1242100501. The next prime is 1242100549. The reversal of 1242100534 is 4350012421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4350012421 = 7499 ⋅580079.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310525132 + ... + 310525135.

It is an arithmetic number, because the mean of its divisors is an integer number (465787701).

Almost surely, 2^1242100534 is an apocalyptic number.

1242100534 is a deficient number, since it is larger than the sum of its proper divisors (621050270).

1242100534 is an equidigital number, since it uses as much as digits as its factorization.

1242100534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621050269.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1242100534 is about 35243.4466816173. The cubic root of 1242100534 is about 1074.9433635927.

Adding to 1242100534 its reverse (4350012421), we get a palindrome (5592112955).

The spelling of 1242100534 in words is "one billion, two hundred forty-two million, one hundred thousand, five hundred thirty-four".