1425240561 has 16 divisors (see below), whose sum is σ = 1920746880. Its totient is φ = 939966720.

The previous prime is 1425240533. The next prime is 1425240601. The reversal of 1425240561 is 1650425241.

It is not a de Polignac number, because 1425240561 - 2⁷ = 1425240433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1425240161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418855 + ... + 422243.

It is an arithmetic number, because the mean of its divisors is an integer number (120046680).

Almost surely, 2^1425240561 is an apocalyptic number.

It is an amenable number.

1425240561 is a deficient number, since it is larger than the sum of its proper divisors (495506319).

1425240561 is a wasteful number, since it uses less digits than its factorization.

1425240561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4856.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1425240561 is about 37752.3583501746. The cubic root of 1425240561 is about 1125.3718766649.

It can be divided in two parts, 142 and 5240561, that added together give a triangular number (5240703 = T₃₂₃₇).

The spelling of 1425240561 in words is "one billion, four hundred twenty-five million, two hundred forty thousand, five hundred sixty-one".