1331420451 has 8 divisors (see below), whose sum is σ = 1778623680. Its totient is φ = 885915432.

The previous prime is 1331420423. The next prime is 1331420477. The reversal of 1331420451 is 1540241331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1331420451 - 2¹³ = 1331412259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331420411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422721 + ... + 425858.

It is an arithmetic number, because the mean of its divisors is an integer number (222327960).

Almost surely, 2^1331420451 is an apocalyptic number.

1331420451 is a deficient number, since it is larger than the sum of its proper divisors (447203229).

1331420451 is an equidigital number, since it uses as much as digits as its factorization.

1331420451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849105.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1331420451 is about 36488.6345455677. The cubic root of 1331420451 is about 1100.1158145277.

Adding to 1331420451 its reverse (1540241331), we get a palindrome (2871661782).

The spelling of 1331420451 in words is "one billion, three hundred thirty-one million, four hundred twenty thousand, four hundred fifty-one".