1295202640 has 80 divisors (see below), whose sum is σ = 3279254400. Its totient is φ = 473872896.

The previous prime is 1295202631. The next prime is 1295202653. The reversal of 1295202640 is 462025921.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29389 + ... + 58771.

It is an arithmetic number, because the mean of its divisors is an integer number (40990680).

Almost surely, 2^1295202640 is an apocalyptic number.

1295202640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1295202640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639627200).

1295202640 is an abundant number, since it is smaller than the sum of its proper divisors (1984051760).

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

1295202640 is a wasteful number, since it uses less digits than its factorization.

1295202640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29444 (or 29438 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1295202640 is about 35988.9238516519. The cubic root of 1295202640 is about 1090.0487142608.

The spelling of 1295202640 in words is "one billion, two hundred ninety-five million, two hundred two thousand, six hundred forty".