1561425293 has 8 divisors (see below), whose sum is σ = 1565676288. Its totient is φ = 1557181584.

The previous prime is 1561425269. The next prime is 1561425317. The reversal of 1561425293 is 3925241651.

It is an interprime number because it is at equal distance from previous prime (1561425269) and next prime (1561425317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1561425293 - 2¹⁰ = 1561424269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561425793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985580 + ... + 987162.

It is an arithmetic number, because the mean of its divisors is an integer number (195709536).

Almost surely, 2^1561425293 is an apocalyptic number.

It is an amenable number.

1561425293 is a deficient number, since it is larger than the sum of its proper divisors (4250995).

1561425293 is a wasteful number, since it uses less digits than its factorization.

1561425293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643.

The product of its digits is 64800, while the sum is 38.

The square root of 1561425293 is about 39514.8743260054. The cubic root of 1561425293 is about 1160.1311021562.

The spelling of 1561425293 in words is "one billion, five hundred sixty-one million, four hundred twenty-five thousand, two hundred ninety-three".