1274479681 has 4 divisors (see below), whose sum is σ = 1349449092. Its totient is φ = 1199510272.

The previous prime is 1274479673. The next prime is 1274479697. The reversal of 1274479681 is 1869744721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 614246656 + 660233025 = 24784^2 + 25695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1274479681 - 2³ = 1274479673 is a prime.

It is a super-2 number, since 2×1274479681² = 3248596914563723522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1274479621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37484680 + ... + 37484713.

It is an arithmetic number, because the mean of its divisors is an integer number (337362273).

Almost surely, 2^1274479681 is an apocalyptic number.

It is an amenable number.

1274479681 is a deficient number, since it is larger than the sum of its proper divisors (74969411).

1274479681 is an equidigital number, since it uses as much as digits as its factorization.

1274479681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74969410.

The product of its digits is 677376, while the sum is 49.

The square root of 1274479681 is about 35699.8554758979. The cubic root of 1274479681 is about 1084.2039170236.

The spelling of 1274479681 in words is "one billion, two hundred seventy-four million, four hundred seventy-nine thousand, six hundred eighty-one".