140425631 has 2 divisors, whose sum is σ = 140425632. Its totient is φ = 140425630.

The previous prime is 140425591. The next prime is 140425643. The reversal of 140425631 is 136524041.

It is a strong prime.

It is an emirp because it is prime and its reverse (136524041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140425631 - 2²² = 136231327 is a prime.

It is a super-2 number, since 2×140425631² = 39438715683496322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140425631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140425031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70212815 + 70212816.

It is an arithmetic number, because the mean of its divisors is an integer number (70212816).

Almost surely, 2^140425631 is an apocalyptic number.

140425631 is a deficient number, since it is larger than the sum of its proper divisors (1).

140425631 is an equidigital number, since it uses as much as digits as its factorization.

140425631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 140425631 is about 11850.1321089682. The cubic root of 140425631 is about 519.7750888791.

Adding to 140425631 its reverse (136524041), we get a palindrome (276949672).

The spelling of 140425631 in words is "one hundred forty million, four hundred twenty-five thousand, six hundred thirty-one".