1281162425 has 24 divisors (see below), whose sum is σ = 1660238976. Its totient is φ = 979755840.

The previous prime is 1281162401. The next prime is 1281162433. The reversal of 1281162425 is 5242611821.

It is not a de Polignac number, because 1281162425 - 2¹⁶ = 1281096889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1281162391 and 1281162400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37847 + ... + 63203.

It is an arithmetic number, because the mean of its divisors is an integer number (69176624).

Almost surely, 2^1281162425 is an apocalyptic number.

It is an amenable number.

1281162425 is a deficient number, since it is larger than the sum of its proper divisors (379076551).

1281162425 is a wasteful number, since it uses less digits than its factorization.

1281162425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25457 (or 25452 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 1281162425 is about 35793.3293366236. The cubic root of 1281162425 is about 1086.0956249944.

The spelling of 1281162425 in words is "one billion, two hundred eighty-one million, one hundred sixty-two thousand, four hundred twenty-five".