1270400999 has 16 divisors (see below), whose sum is σ = 1532616000. Its totient is φ = 1051358112.

The previous prime is 1270400993. The next prime is 1270401037. The reversal of 1270400999 is 9990040721.

It is a happy number.

It is not a de Polignac number, because 1270400999 - 2¹² = 1270396903 is a prime.

It is a super-2 number, since 2×1270400999² = 3227837396520396002, 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 (1270400993) 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, 53912 + ... + 73805.

It is an arithmetic number, because the mean of its divisors is an integer number (95788500).

Almost surely, 2^1270400999 is an apocalyptic number.

1270400999 is a deficient number, since it is larger than the sum of its proper divisors (262215001).

1270400999 is an equidigital number, since it uses as much as digits as its factorization.

1270400999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127767 (or 127753 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1270400999 is about 35642.6850700112. The cubic root of 1270400999 is about 1083.0460984502.

The spelling of 1270400999 in words is "one billion, two hundred seventy million, four hundred thousand, nine hundred ninety-nine".