1450631561 has 4 divisors (see below), whose sum is σ = 1451229252. Its totient is φ = 1450033872.

The previous prime is 1450631557. The next prime is 1450631563. The reversal of 1450631561 is 1651360541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1651360541 = 1483 ⋅1113527.

It can be written as a sum of positive squares in 2 ways, for example, as 569729161 + 880902400 = 23869^2 + 29680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1450631561 - 2² = 1450631557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1450631563) 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, 295190 + ... + 300063.

It is an arithmetic number, because the mean of its divisors is an integer number (362807313).

Almost surely, 2^1450631561 is an apocalyptic number.

It is an amenable number.

1450631561 is a deficient number, since it is larger than the sum of its proper divisors (597691).

1450631561 is an equidigital number, since it uses as much as digits as its factorization.

1450631561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597690.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1450631561 is about 38087.1574287187. The cubic root of 1450631561 is about 1132.0155015524.

The spelling of 1450631561 in words is "one billion, four hundred fifty million, six hundred thirty-one thousand, five hundred sixty-one".