1273687401 has 32 divisors (see below), whose sum is σ = 2045352960. Its totient is φ = 688723776.

The previous prime is 1273687369. The next prime is 1273687417. The reversal of 1273687401 is 1047863721.

It is not a de Polignac number, because 1273687401 - 2⁵ = 1273687369 is a prime.

It is a super-2 number, since 2×1273687401² = 3244559190932269602, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1273687401.

It is not an unprimeable number, because it can be changed into a prime (1273687301) 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 31 ways as a sum of consecutive naturals, for example, 568255 + ... + 570491.

It is an arithmetic number, because the mean of its divisors is an integer number (63917280).

Almost surely, 2^1273687401 is an apocalyptic number.

It is an amenable number.

1273687401 is a deficient number, since it is larger than the sum of its proper divisors (771665559).

1273687401 is a wasteful number, since it uses less digits than its factorization.

1273687401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 1273687401 is about 35688.7573473776. The cubic root of 1273687401 is about 1083.9792054148.

The spelling of 1273687401 in words is "one billion, two hundred seventy-three million, six hundred eighty-seven thousand, four hundred one".