1561245432 has 16 divisors (see below), whose sum is σ = 3903113640. Its totient is φ = 520415136.

The previous prime is 1561245431. The next prime is 1561245443. The reversal of 1561245432 is 2345421651.

It is a junction number, because it is equal to n+sod(n) for n = 1561245393 and 1561245402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561245431) 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, 32525923 + ... + 32525970.

Almost surely, 2^1561245432 is an apocalyptic number.

1561245432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561245432 is an abundant number, since it is smaller than the sum of its proper divisors (2341868208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561245432 is a wasteful number, since it uses less digits than its factorization.

1561245432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65051902 (or 65051898 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 1561245432 is about 39512.5983959547. The cubic root of 1561245432 is about 1160.0865551744.

The spelling of 1561245432 in words is "one billion, five hundred sixty-one million, two hundred forty-five thousand, four hundred thirty-two".