1281652442 has 16 divisors (see below), whose sum is σ = 2206802880. Its totient is φ = 546858528.

The previous prime is 1281652439. The next prime is 1281652469. The reversal of 1281652442 is 2442561821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198467 + ... + 204822.

It is an arithmetic number, because the mean of its divisors is an integer number (137925180).

Almost surely, 2^1281652442 is an apocalyptic number.

1281652442 is a deficient number, since it is larger than the sum of its proper divisors (925150438).

1281652442 is a wasteful number, since it uses less digits than its factorization.

1281652442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403525.

The product of its digits is 30720, while the sum is 35.

The square root of 1281652442 is about 35800.1737705280. The cubic root of 1281652442 is about 1086.2340767294.

The spelling of 1281652442 in words is "one billion, two hundred eighty-one million, six hundred fifty-two thousand, four hundred forty-two".