1062420781 has 4 divisors (see below), whose sum is σ = 1066554972. Its totient is φ = 1058286592.

The previous prime is 1062420773. The next prime is 1062420787. The reversal of 1062420781 is 1870242601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1870242601 = 109 ⋅17158189.

It can be written as a sum of positive squares in 2 ways, for example, as 996664900 + 65755881 = 31570^2 + 8109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1062420781 - 2³ = 1062420773 is a prime.

It is a super-2 number, since 2×1062420781² = 2257475831801299922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1062420787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2066710 + ... + 2067223.

It is an arithmetic number, because the mean of its divisors is an integer number (266638743).

Almost surely, 2^1062420781 is an apocalyptic number.

It is an amenable number.

1062420781 is a deficient number, since it is larger than the sum of its proper divisors (4134191).

1062420781 is an equidigital number, since it uses as much as digits as its factorization.

1062420781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134190.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1062420781 is about 32594.7968393730. The cubic root of 1062420781 is about 1020.3884144855.

The spelling of 1062420781 in words is "one billion, sixty-two million, four hundred twenty thousand, seven hundred eighty-one".