1407427561 has 4 divisors (see below), whose sum is σ = 1433982852. Its totient is φ = 1380872272.

The previous prime is 1407427537. The next prime is 1407427573. The reversal of 1407427561 is 1657247041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 593409600 + 814017961 = 24360^2 + 28531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1407427561 - 2⁵ = 1407427529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1407427561.

It is not an unprimeable number, because it can be changed into a prime (1401427561) 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, 13277566 + ... + 13277671.

It is an arithmetic number, because the mean of its divisors is an integer number (358495713).

Almost surely, 2^1407427561 is an apocalyptic number.

It is an amenable number.

1407427561 is a deficient number, since it is larger than the sum of its proper divisors (26555291).

1407427561 is an equidigital number, since it uses as much as digits as its factorization.

1407427561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26555290.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1407427561 is about 37515.6975278349. The cubic root of 1407427561 is about 1120.6638180561.

The spelling of 1407427561 in words is "one billion, four hundred seven million, four hundred twenty-seven thousand, five hundred sixty-one".