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140640225 = 35211170473
BaseRepresentation
bin10000110000111…
…11111111100001
3100210122021010020
420120133333201
5242000441400
621542224053
73325264545
oct1030377741
9323567106
10140640225
117242a0a0
123b125029
13231a288b
141496da25
15c5312a0
hex861ffe1

140640225 has 24 divisors (see below), whose sum is σ = 253665312. Its totient is φ = 68188800.

The previous prime is 140640187. The next prime is 140640251. The reversal of 140640225 is 522046041.

It is not a de Polignac number, because 140640225 - 26 = 140640161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140640195 and 140640204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84412 + ... + 86061.

It is an arithmetic number, because the mean of its divisors is an integer number (10569388).

Almost surely, 2140640225 is an apocalyptic number.

140640225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140640225 is a deficient number, since it is larger than the sum of its proper divisors (113025087).

140640225 is a wasteful number, since it uses less digits than its factorization.

140640225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170497 (or 170492 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 140640225 is about 11859.1831506221. The cubic root of 140640225 is about 520.0397220642.

Adding to 140640225 its reverse (522046041), we get a palindrome (662686266).

The spelling of 140640225 in words is "one hundred forty million, six hundred forty thousand, two hundred twenty-five".

Divisors: 1 3 5 11 15 25 33 55 75 165 275 825 170473 511419 852365 1875203 2557095 4261825 5625609 9376015 12785475 28128045 46880075 140640225