1321500454 has 4 divisors (see below), whose sum is σ = 1982250684. Its totient is φ = 660750226.

The previous prime is 1321500451. The next prime is 1321500461. The reversal of 1321500454 is 4540051231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1321500454² = 3492726899844412232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321500451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330375112 + ... + 330375115.

It is an arithmetic number, because the mean of its divisors is an integer number (495562671).

Almost surely, 2^1321500454 is an apocalyptic number.

1321500454 is a deficient number, since it is larger than the sum of its proper divisors (660750230).

1321500454 is an equidigital number, since it uses as much as digits as its factorization.

1321500454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660750229.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1321500454 is about 36352.4477030089. The cubic root of 1321500454 is about 1097.3767945090.

Adding to 1321500454 its reverse (4540051231), we get a palindrome (5861551685).

The spelling of 1321500454 in words is "one billion, three hundred twenty-one million, five hundred thousand, four hundred fifty-four".