945975451 has 4 divisors (see below), whose sum is σ = 947310400. Its totient is φ = 944640504.

The previous prime is 945975449. The next prime is 945975461. The reversal of 945975451 is 154579549.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154579549 = 109 ⋅1418161.

It is a cyclic number.

It is not a de Polignac number, because 945975451 - 2¹ = 945975449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 945975395 and 945975404.

It is not an unprimeable number, because it can be changed into a prime (945975461) 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, 666411 + ... + 667828.

It is an arithmetic number, because the mean of its divisors is an integer number (236827600).

Almost surely, 2^945975451 is an apocalyptic number.

945975451 is a deficient number, since it is larger than the sum of its proper divisors (1334949).

945975451 is a wasteful number, since it uses less digits than its factorization.

945975451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334948.

The product of its digits is 1134000, while the sum is 49.

The square root of 945975451 is about 30756.7139174522. The cubic root of 945975451 is about 981.6574240271.

The spelling of 945975451 in words is "nine hundred forty-five million, nine hundred seventy-five thousand, four hundred fifty-one".