1295780740 has 24 divisors (see below), whose sum is σ = 2725211160. Its totient is φ = 517536768.

The previous prime is 1295780713. The next prime is 1295780767. The reversal of 1295780740 is 470875921.

It is an interprime number because it is at equal distance from previous prime (1295780713) and next prime (1295780767).

It can be written as a sum of positive squares in 4 ways, for example, as 394340164 + 901440576 = 19858^2 + 30024^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34675 + ... + 61594.

It is an arithmetic number, because the mean of its divisors is an integer number (113550465).

Almost surely, 2^1295780740 is an apocalyptic number.

1295780740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1295780740 is an abundant number, since it is smaller than the sum of its proper divisors (1429430420).

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

1295780740 is a wasteful number, since it uses less digits than its factorization.

1295780740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96951 (or 96949 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 1295780740 is about 35996.9545934097. The cubic root of 1295780740 is about 1090.2108673765.

The spelling of 1295780740 in words is "one billion, two hundred ninety-five million, seven hundred eighty thousand, seven hundred forty".