1280121274 has 4 divisors (see below), whose sum is σ = 1920181914. Its totient is φ = 640060636.

The previous prime is 1280121263. The next prime is 1280121307. The reversal of 1280121274 is 4721210821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4721210821 = 8273 ⋅570677.

It can be written as a sum of positive squares in only one way, i.e., 1279135225 + 986049 = 35765^2 + 993^2 .

It is a super-2 number, since 2×1280121274² = 3277420952294766152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320030317 + ... + 320030320.

Almost surely, 2^1280121274 is an apocalyptic number.

1280121274 is a deficient number, since it is larger than the sum of its proper divisors (640060640).

1280121274 is an equidigital number, since it uses as much as digits as its factorization.

1280121274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640060639.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1280121274 is about 35778.7824555280. The cubic root of 1280121274 is about 1085.8013360011.

It can be divided in two parts, 128012 and 1274, that added together give a triangular number (129286 = T₅₀₈).

The spelling of 1280121274 in words is "one billion, two hundred eighty million, one hundred twenty-one thousand, two hundred seventy-four".