1020655450 has 24 divisors (see below), whose sum is σ = 1934243388. Its totient is φ = 400558080.

The previous prime is 1020655409. The next prime is 1020655451. The reversal of 1020655450 is 545560201.

It can be written as a sum of positive squares in 6 ways, for example, as 707613201 + 313042249 = 26601^2 + 17693^2 .

It is a super-2 number, since 2×1020655450² = 2083475095229405000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020655451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189927 + ... + 195226.

Almost surely, 2^1020655450 is an apocalyptic number.

1020655450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020655450 is a deficient number, since it is larger than the sum of its proper divisors (913587938).

1020655450 is a wasteful number, since it uses less digits than its factorization.

1020655450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385218 (or 385213 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1020655450 is about 31947.6986651621. The cubic root of 1020655450 is about 1006.8382813178.

It can be divided in two parts, 10206 and 55450, that added together give a palindrome (65656).

The spelling of 1020655450 in words is "one billion, twenty million, six hundred fifty-five thousand, four hundred fifty".