1451521001 has 4 divisors (see below), whose sum is σ = 1658881152. Its totient is φ = 1244160852.

The previous prime is 1451520949. The next prime is 1451521033. The reversal of 1451521001 is 1001251541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001251541 = 149 ⋅6719809.

It is a cyclic number.

It is not a de Polignac number, because 1451521001 - 2⁶ = 1451520937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1451521301) 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, 103680065 + ... + 103680078.

It is an arithmetic number, because the mean of its divisors is an integer number (414720288).

Almost surely, 2^1451521001 is an apocalyptic number.

It is an amenable number.

1451521001 is a deficient number, since it is larger than the sum of its proper divisors (207360151).

1451521001 is an equidigital number, since it uses as much as digits as its factorization.

1451521001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207360150.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1451521001 is about 38098.8320162180. The cubic root of 1451521001 is about 1132.2468155499.

Adding to 1451521001 its reverse (1001251541), we get a palindrome (2452772542).

The spelling of 1451521001 in words is "one billion, four hundred fifty-one million, five hundred twenty-one thousand, one".