1620126542 has 16 divisors (see below), whose sum is σ = 2561880960. Its totient is φ = 766292472.

The previous prime is 1620126533. The next prime is 1620126577. The reversal of 1620126542 is 2456210261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5258 + ... + 57165.

It is an arithmetic number, because the mean of its divisors is an integer number (160117560).

Almost surely, 2^1620126542 is an apocalyptic number.

1620126542 is a deficient number, since it is larger than the sum of its proper divisors (941754418).

1620126542 is a wasteful number, since it uses less digits than its factorization.

1620126542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63127.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1620126542 is about 40250.7955449330. The cubic root of 1620126542 is about 1174.4908715039.

The spelling of 1620126542 in words is "one billion, six hundred twenty million, one hundred twenty-six thousand, five hundred forty-two".