1020266642 has 16 divisors (see below), whose sum is σ = 1562946840. Its totient is φ = 499329792.

The previous prime is 1020266641. The next prime is 1020266651. The reversal of 1020266642 is 2466620201.

It can be written as a sum of positive squares in 4 ways, for example, as 676572121 + 343694521 = 26011^2 + 18539^2 .

It is not an unprimeable number, because it can be changed into a prime (1020266641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34784 + ... + 57012.

Almost surely, 2^1020266642 is an apocalyptic number.

1020266642 is a deficient number, since it is larger than the sum of its proper divisors (542680198).

1020266642 is a wasteful number, since it uses less digits than its factorization.

1020266642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22717.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1020266642 is about 31941.6130149997. The cubic root of 1020266642 is about 1006.7104169155.

Adding to 1020266642 its reverse (2466620201), we get a palindrome (3486886843).

The spelling of 1020266642 in words is "one billion, twenty million, two hundred sixty-six thousand, six hundred forty-two".