1451421247 has 4 divisors (see below), whose sum is σ = 1451801800. Its totient is φ = 1451040696.

The previous prime is 1451421221. The next prime is 1451421289. The reversal of 1451421247 is 7421241541.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1451421247 - 2⁷ = 1451421119 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451421217) 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, 184497 + ... + 192202.

It is an arithmetic number, because the mean of its divisors is an integer number (362950450).

Almost surely, 2^1451421247 is an apocalyptic number.

1451421247 is a deficient number, since it is larger than the sum of its proper divisors (380553).

1451421247 is an equidigital number, since it uses as much as digits as its factorization.

1451421247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380552.

The product of its digits is 8960, while the sum is 31.

The square root of 1451421247 is about 38097.5228459804. The cubic root of 1451421247 is about 1132.2208775313.

Adding to 1451421247 its reverse (7421241541), we get a palindrome (8872662788).

The spelling of 1451421247 in words is "one billion, four hundred fifty-one million, four hundred twenty-one thousand, two hundred forty-seven".