157121280 has 216 divisors, whose sum is σ = 568215648. Its totient is φ = 40009728.

The previous prime is 157121273. The next prime is 157121287. The reversal of 157121280 is 82121751.

157121280 is a `hidden beast` number, since 1 + 571 + 2 + 12 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (157121273) and next prime (157121287).

It is not an unprimeable number, because it can be changed into a prime (157121287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264664 + ... + 265256.

It is an arithmetic number, because the mean of its divisors is an integer number (2630628).

Almost surely, 2^157121280 is an apocalyptic number.

157121280 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 157121280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284107824).

157121280 is an abundant number, since it is smaller than the sum of its proper divisors (411094368).

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

157121280 is a wasteful number, since it uses less digits than its factorization.

157121280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 157121280 is about 12534.8027507416. The cubic root of 157121280 is about 539.6079458800.

The spelling of 157121280 in words is "one hundred fifty-seven million, one hundred twenty-one thousand, two hundred eighty".