1260320021940 has 48 divisors (see below), whose sum is σ = 4033024071552. Its totient is φ = 288073147776.

The previous prime is 1260320021903. The next prime is 1260320021941. The reversal of 1260320021940 is 491200230621.

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 = 1260320021898 and 1260320021907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260320021941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500380559 + ... + 1500381398.

It is an arithmetic number, because the mean of its divisors is an integer number (84021334824).

Almost surely, 2^{1260320021940} is an apocalyptic number.

1260320021940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260320021940 is an abundant number, since it is smaller than the sum of its proper divisors (2772704049612).

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

1260320021940 is a wasteful number, since it uses less digits than its factorization.

1260320021940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000761976 (or 3000761974 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 1260320021940 in words is "one trillion, two hundred sixty billion, three hundred twenty million, twenty-one thousand, nine hundred forty".