1451244432421 has 32 divisors (see below), whose sum is σ = 1699081832448. Its totient is φ = 1213935750720.

The previous prime is 1451244432409. The next prime is 1451244432467. The reversal of 1451244432421 is 1242344421541.

It is a happy number.

It is not a de Polignac number, because 1451244432421 - 2⁹ = 1451244431909 is a prime.

It is a super-2 number, since 2×1451244432421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451244432481) 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 31 ways as a sum of consecutive naturals, for example, 22293306 + ... + 22358308.

It is an arithmetic number, because the mean of its divisors is an integer number (53096307264).

Almost surely, 2^{1451244432421} is an apocalyptic number.

It is an amenable number.

1451244432421 is a deficient number, since it is larger than the sum of its proper divisors (247837400027).

1451244432421 is a wasteful number, since it uses less digits than its factorization.

1451244432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65521.

The product of its digits is 122880, while the sum is 37.

Adding to 1451244432421 its reverse (1242344421541), we get a palindrome (2693588853962).

The spelling of 1451244432421 in words is "one trillion, four hundred fifty-one billion, two hundred forty-four million, four hundred thirty-two thousand, four hundred twenty-one".