157894281 has 24 divisors (see below), whose sum is σ = 236011464. Its totient is φ = 101640960.

The previous prime is 157894279. The next prime is 157894301. The reversal of 157894281 is 182498751.

It can be written as a sum of positive squares in 4 ways, for example, as 36542025 + 121352256 = 6045^2 + 11016^2 .

It is not a de Polignac number, because 157894281 - 2¹ = 157894279 is a prime.

It is a super-2 number, since 2×157894281² = 49861207945013922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157894201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43891 + ... + 47351.

It is an arithmetic number, because the mean of its divisors is an integer number (9833811).

Almost surely, 2^157894281 is an apocalyptic number.

It is an amenable number.

157894281 is a deficient number, since it is larger than the sum of its proper divisors (78117183).

157894281 is a wasteful number, since it uses less digits than its factorization.

157894281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641 (or 3638 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 157894281 is about 12565.5991102693. The cubic root of 157894281 is about 540.4914148033.

It can be divided in two parts, 1578 and 94281, that added together give a palindrome (95859).

The spelling of 157894281 in words is "one hundred fifty-seven million, eight hundred ninety-four thousand, two hundred eighty-one".