1391130081 has 12 divisors (see below), whose sum is σ = 2192083920. Its totient is φ = 843109080.

The previous prime is 1391130079. The next prime is 1391130113. The reversal of 1391130081 is 1800311931.

It is a happy number.

It is not a de Polignac number, because 1391130081 - 2¹ = 1391130079 is a prime.

It is a super-2 number, since 2×1391130081² = 3870485804526133122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1391830081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7025811 + ... + 7026008.

It is an arithmetic number, because the mean of its divisors is an integer number (182673660).

Almost surely, 2^1391130081 is an apocalyptic number.

1391130081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1391130081 is a deficient number, since it is larger than the sum of its proper divisors (800953839).

1391130081 is a wasteful number, since it uses less digits than its factorization.

1391130081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14051836 (or 14051833 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1391130081 is about 37297.8562520690. The cubic root of 1391130081 is about 1116.3213920958.

The spelling of 1391130081 in words is "one billion, three hundred ninety-one million, one hundred thirty thousand, eighty-one".