140621307 has 4 divisors (see below), whose sum is σ = 187495080. Its totient is φ = 93747536.

The previous prime is 140621293. The next prime is 140621323. The reversal of 140621307 is 703126041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703126041 = 3 ⋅234375347.

It is a cyclic number.

It is not a de Polignac number, because 140621307 - 2⁴ = 140621291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140621357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23436882 + ... + 23436887.

It is an arithmetic number, because the mean of its divisors is an integer number (46873770).

Almost surely, 2^140621307 is an apocalyptic number.

140621307 is a deficient number, since it is larger than the sum of its proper divisors (46873773).

140621307 is an equidigital number, since it uses as much as digits as its factorization.

140621307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46873772.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 140621307 is about 11858.3855140571. The cubic root of 140621307 is about 520.0164035752.

Adding to 140621307 its reverse (703126041), we get a palindrome (843747348).

The spelling of 140621307 in words is "one hundred forty million, six hundred twenty-one thousand, three hundred seven".