1260642540 has 48 divisors (see below), whose sum is σ = 3625205472. Its totient is φ = 327085056.

The previous prime is 1260642491. The next prime is 1260642553. The reversal of 1260642540 is 452460621.

It is a super-2 number, since 2×1260642540² = 3178439227315303200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1260642498 and 1260642507.

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, 281709 + ... + 286148.

It is an arithmetic number, because the mean of its divisors is an integer number (75525114).

Almost surely, 2^1260642540 is an apocalyptic number.

1260642540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260642540 is an abundant number, since it is smaller than the sum of its proper divisors (2364562932).

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

1260642540 is a wasteful number, since it uses less digits than its factorization.

1260642540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567906 (or 567904 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1260642540 is about 35505.5283019419. The cubic root of 1260642540 is about 1080.2658639021.

The spelling of 1260642540 in words is "one billion, two hundred sixty million, six hundred forty-two thousand, five hundred forty".