1260121536 has 140 divisors (see below), whose sum is σ = 3822940792. Its totient is φ = 410199552.

The previous prime is 1260121529. The next prime is 1260121567. The reversal of 1260121536 is 6351210621.

1260121536 is a `hidden beast` number, since 1 + 2 + 6 + 0 + 121 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 220086 + ... + 225738.

Almost surely, 2^1260121536 is an apocalyptic number.

1260121536 is a gapful number since it is divisible by the number (16) 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 1260121536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911470396).

1260121536 is an abundant number, since it is smaller than the sum of its proper divisors (2562819256).

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

1260121536 is an equidigital number, since it uses as much as digits as its factorization.

1260121536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720 (or 5701 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1260121536 is about 35498.1906017757. The cubic root of 1260121536 is about 1080.1170243563.

The spelling of 1260121536 in words is "one billion, two hundred sixty million, one hundred twenty-one thousand, five hundred thirty-six".