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140445457 is a prime number
BaseRepresentation
bin10000101111100…
…00011100010001
3100210021100221121
420113300130101
5241423223312
621534122241
73323523655
oct1027603421
9323240847
10140445457
1172306829
123b050381
1323135029
141491ca65
15c4e3707
hex85f0711

140445457 has 2 divisors, whose sum is σ = 140445458. Its totient is φ = 140445456.

The previous prime is 140445433. The next prime is 140445491. The reversal of 140445457 is 754544041.

It is an a-pointer prime, because the next prime (140445491) can be obtained adding 140445457 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140398801 + 46656 = 11849^2 + 216^2 .

It is a cyclic number.

It is not a de Polignac number, because 140445457 - 27 = 140445329 is a prime.

It is not a weakly prime, because it can be changed into another prime (140445157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70222728 + 70222729.

It is an arithmetic number, because the mean of its divisors is an integer number (70222729).

Almost surely, 2140445457 is an apocalyptic number.

It is an amenable number.

140445457 is a deficient number, since it is larger than the sum of its proper divisors (1).

140445457 is an equidigital number, since it uses as much as digits as its factorization.

140445457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 34.

The square root of 140445457 is about 11850.9686102023. The cubic root of 140445457 is about 519.7995492190.

Adding to 140445457 its reverse (754544041), we get a palindrome (894989498).

The spelling of 140445457 in words is "one hundred forty million, four hundred forty-five thousand, four hundred fifty-seven".