1290139927 has 8 divisors (see below), whose sum is σ = 1332288000. Its totient is φ = 1248025080.

The previous prime is 1290139913. The next prime is 1290139937. The reversal of 1290139927 is 7299310921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1290139927 - 2¹¹ = 1290137879 is a prime.

It is a super-2 number, since 2×1290139927² = 3328922062479130658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290139937) 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, 88824 + ... + 102322.

It is an arithmetic number, because the mean of its divisors is an integer number (166536000).

Almost surely, 2^1290139927 is an apocalyptic number.

1290139927 is a deficient number, since it is larger than the sum of its proper divisors (42148073).

1290139927 is a wasteful number, since it uses less digits than its factorization.

1290139927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16613.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1290139927 is about 35918.5178842335. The cubic root of 1290139927 is about 1088.6265919125.

The spelling of 1290139927 in words is "one billion, two hundred ninety million, one hundred thirty-nine thousand, nine hundred twenty-seven".