1271226042 has 16 divisors (see below), whose sum is σ = 2824946880. Its totient is φ = 423741996.

The previous prime is 1271226023. The next prime is 1271226043. The reversal of 1271226042 is 2406221721.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1271225997 and 1271226015.

It is not an unprimeable number, because it can be changed into a prime (1271226043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11770558 + ... + 11770665.

It is an arithmetic number, because the mean of its divisors is an integer number (176559180).

Almost surely, 2^1271226042 is an apocalyptic number.

1271226042 is an abundant number, since it is smaller than the sum of its proper divisors (1553720838).

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

1271226042 is a wasteful number, since it uses less digits than its factorization.

1271226042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23541234 (or 23541228 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1271226042 is about 35654.2569968861. The cubic root of 1271226042 is about 1083.2805037643.

Adding to 1271226042 its reverse (2406221721), we get a palindrome (3677447763).

The spelling of 1271226042 in words is "one billion, two hundred seventy-one million, two hundred twenty-six thousand, forty-two".