1270778349 has 16 divisors (see below), whose sum is σ = 1790151680. Its totient is φ = 799625520.

The previous prime is 1270778329. The next prime is 1270778363. The reversal of 1270778349 is 9438770721.

It is not a de Polignac number, because 1270778349 - 2¹³ = 1270770157 is a prime.

It is a super-2 number, since 2×1270778349² = 3229755224574331602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1270778298 and 1270778307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270778329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25687 + ... + 56580.

It is an arithmetic number, because the mean of its divisors is an integer number (111884480).

Almost surely, 2^1270778349 is an apocalyptic number.

1270778349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1270778349 is a deficient number, since it is larger than the sum of its proper divisors (519373331).

1270778349 is a wasteful number, since it uses less digits than its factorization.

1270778349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82560.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 1270778349 is about 35647.9781895131. The cubic root of 1270778349 is about 1083.1533210222.

The spelling of 1270778349 in words is "one billion, two hundred seventy million, seven hundred seventy-eight thousand, three hundred forty-nine".