136781250 has 56 divisors (see below), whose sum is σ = 342183120. Its totient is φ = 36450000.

The previous prime is 136781243. The next prime is 136781251. The reversal of 136781250 is 52187631.

It is a super-2 number, since 2×136781250² = 37418220703125000, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136781251) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 93021 + ... + 94479.

Almost surely, 2^136781250 is an apocalyptic number.

136781250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 136781250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171091560).

136781250 is an abundant number, since it is smaller than the sum of its proper divisors (205401870).

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

136781250 is an frugal number, since it uses more digits than its factorization.

136781250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 136781250 is about 11695.3516407161. The cubic root of 136781250 is about 515.2391511895.

The spelling of 136781250 in words is "one hundred thirty-six million, seven hundred eighty-one thousand, two hundred fifty".