1451640121 has 4 divisors (see below), whose sum is σ = 1458520144. Its totient is φ = 1444760100.

The previous prime is 1451640103. The next prime is 1451640181. The reversal of 1451640121 is 1210461541.

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: 1210461541 = 53 ⋅22838897.

It is a cyclic number.

It is not a de Polignac number, because 1451640121 - 2⁷ = 1451639993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1451640181) 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, 3439695 + ... + 3440116.

It is an arithmetic number, because the mean of its divisors is an integer number (364630036).

Almost surely, 2^1451640121 is an apocalyptic number.

It is an amenable number.

1451640121 is a deficient number, since it is larger than the sum of its proper divisors (6880023).

1451640121 is an equidigital number, since it uses as much as digits as its factorization.

1451640121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880022.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1451640121 is about 38100.3952866634. The cubic root of 1451640121 is about 1132.2777875559.

The spelling of 1451640121 in words is "one billion, four hundred fifty-one million, six hundred forty thousand, one hundred twenty-one".