1275137740 has 12 divisors (see below), whose sum is σ = 2677789296. Its totient is φ = 510055088.

The previous prime is 1275137737. The next prime is 1275137789. The reversal of 1275137740 is 477315721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1275137740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31878424 + ... + 31878463.

It is an arithmetic number, because the mean of its divisors is an integer number (223149108).

Almost surely, 2^1275137740 is an apocalyptic number.

1275137740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275137740 is an abundant number, since it is smaller than the sum of its proper divisors (1402651556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275137740 is a wasteful number, since it uses less digits than its factorization.

1275137740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63756896 (or 63756894 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 1275137740 is about 35709.0708364135. The cubic root of 1275137740 is about 1084.3904892106.

The spelling of 1275137740 in words is "one billion, two hundred seventy-five million, one hundred thirty-seven thousand, seven hundred forty".