140078551 has 2 divisors, whose sum is σ = 140078552. Its totient is φ = 140078550.

The previous prime is 140078539. The next prime is 140078597. The reversal of 140078551 is 155870041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140078551 - 2⁷ = 140078423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140072551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70039275 + 70039276.

It is an arithmetic number, because the mean of its divisors is an integer number (70039276).

Almost surely, 2^140078551 is an apocalyptic number.

140078551 is a deficient number, since it is larger than the sum of its proper divisors (1).

140078551 is an equidigital number, since it uses as much as digits as its factorization.

140078551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 140078551 is about 11835.4784863139. The cubic root of 140078551 is about 519.3465052671.

The spelling of 140078551 in words is "one hundred forty million, seventy-eight thousand, five hundred fifty-one".