1279445742 has 48 divisors (see below), whose sum is σ = 2821261248. Its totient is φ = 418970880.

The previous prime is 1279445719. The next prime is 1279445743. The reversal of 1279445742 is 2475449721.

1279445742 is a `hidden beast` number, since 1 + 2 + 79 + 4 + 4 + 574 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279445743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354298 + ... + 357890.

It is an arithmetic number, because the mean of its divisors is an integer number (58776276).

Almost surely, 2^1279445742 is an apocalyptic number.

1279445742 is an abundant number, since it is smaller than the sum of its proper divisors (1541815506).

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

1279445742 is a wasteful number, since it uses less digits than its factorization.

1279445742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945 (or 3942 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 1279445742 is about 35769.3408102526. The cubic root of 1279445742 is about 1085.6103065456.

The spelling of 1279445742 in words is "one billion, two hundred seventy-nine million, four hundred forty-five thousand, seven hundred forty-two".