1205262640 has 40 divisors (see below), whose sum is σ = 2892636288. Its totient is φ = 466552320.

The previous prime is 1205262599. The next prime is 1205262673. The reversal of 1205262640 is 462625021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1205262599 and 1205262608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240517 + ... + 245476.

Almost surely, 2^1205262640 is an apocalyptic number.

1205262640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205262640 is an abundant number, since it is smaller than the sum of its proper divisors (1687373648).

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

1205262640 is a wasteful number, since it uses less digits than its factorization.

1205262640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486037 (or 486031 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1205262640 is about 34716.8927180991. The cubic root of 1205262640 is about 1064.2097453351.

Adding to 1205262640 its reverse (462625021), we get a palindrome (1667887661).

The spelling of 1205262640 in words is "one billion, two hundred five million, two hundred sixty-two thousand, six hundred forty".