1278051270 has 32 divisors (see below), whose sum is σ = 3069792000. Its totient is φ = 340539360.

The previous prime is 1278051263. The next prime is 1278051277. The reversal of 1278051270 is 721508721.

It is an interprime number because it is at equal distance from previous prime (1278051263) and next prime (1278051277).

It is a super-2 number, since 2×1278051270² = 3266830097497225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278051277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22231 + ... + 55229.

It is an arithmetic number, because the mean of its divisors is an integer number (95931000).

Almost surely, 2^1278051270 is an apocalyptic number.

1278051270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278051270 is an abundant number, since it is smaller than the sum of its proper divisors (1791740730).

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

1278051270 is a wasteful number, since it uses less digits than its factorization.

1278051270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34300.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 1278051270 is about 35749.8429367179. The cubic root of 1278051270 is about 1085.2157597917.

Adding to 1278051270 its reverse (721508721), we get a palindrome (1999559991).

The spelling of 1278051270 in words is "one billion, two hundred seventy-eight million, fifty-one thousand, two hundred seventy".