1001402566 has 16 divisors (see below), whose sum is σ = 1569506400. Its totient is φ = 478291968.

The previous prime is 1001402557. The next prime is 1001402603. The reversal of 1001402566 is 6652041001.

It is a self number, because there is not a number n which added to its sum of digits gives 1001402566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21220 + ... + 49528.

It is an arithmetic number, because the mean of its divisors is an integer number (98094150).

Almost surely, 2^1001402566 is an apocalyptic number.

1001402566 is a deficient number, since it is larger than the sum of its proper divisors (568103834).

1001402566 is a wasteful number, since it uses less digits than its factorization.

1001402566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29103.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1001402566 is about 31644.9453467690. The cubic root of 1001402566 is about 1000.4673035933.

Adding to 1001402566 its reverse (6652041001), we get a palindrome (7653443567).

The spelling of 1001402566 in words is "one billion, one million, four hundred two thousand, five hundred sixty-six".