140151421 has 4 divisors (see below), whose sum is σ = 140672700. Its totient is φ = 139630144.

The previous prime is 140151409. The next prime is 140151433. The reversal of 140151421 is 124151041.

140151421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124151041 = 7 ⋅17735863.

It is an interprime number because it is at equal distance from previous prime (140151409) and next prime (140151433).

It can be written as a sum of positive squares in 2 ways, for example, as 27154521 + 112996900 = 5211^2 + 10630^2 .

It is a cyclic number.

It is not a de Polignac number, because 140151421 - 2¹³ = 140143229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140151481) 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, 260236 + ... + 260773.

It is an arithmetic number, because the mean of its divisors is an integer number (35168175).

Almost surely, 2^140151421 is an apocalyptic number.

It is an amenable number.

140151421 is a deficient number, since it is larger than the sum of its proper divisors (521279).

140151421 is an equidigital number, since it uses as much as digits as its factorization.

140151421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521278.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 140151421 is about 11838.5565420789. The cubic root of 140151421 is about 519.4365457458.

The spelling of 140151421 in words is "one hundred forty million, one hundred fifty-one thousand, four hundred twenty-one".