1275542942 has 4 divisors (see below), whose sum is σ = 1913314416. Its totient is φ = 637771470.

The previous prime is 1275542909. The next prime is 1275542951. The reversal of 1275542942 is 2492455721.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1275542942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318885734 + ... + 318885737.

It is an arithmetic number, because the mean of its divisors is an integer number (478328604).

Almost surely, 2^1275542942 is an apocalyptic number.

1275542942 is a deficient number, since it is larger than the sum of its proper divisors (637771474).

1275542942 is an equidigital number, since it uses as much as digits as its factorization.

1275542942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637771473.

The product of its digits is 201600, while the sum is 41.

The square root of 1275542942 is about 35714.7440422020. The cubic root of 1275542942 is about 1084.5053397210.

The spelling of 1275542942 in words is "one billion, two hundred seventy-five million, five hundred forty-two thousand, nine hundred forty-two".