140561421 has 32 divisors (see below), whose sum is σ = 251639808. Its totient is φ = 67400640.

The previous prime is 140561401. The next prime is 140561429. The reversal of 140561421 is 124165041.

It is a happy number.

It is not a de Polignac number, because 140561421 - 2⁹ = 140560909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140561391 and 140561400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140561429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20401 + ... + 26406.

It is an arithmetic number, because the mean of its divisors is an integer number (7863744).

Almost surely, 2^140561421 is an apocalyptic number.

140561421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140561421 is a deficient number, since it is larger than the sum of its proper divisors (111078387).

140561421 is a wasteful number, since it uses less digits than its factorization.

140561421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46841.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 140561421 is about 11855.8601965442. The cubic root of 140561421 is about 519.9425737866.

It can be divided in two parts, 1405 and 61421, that added together give a palindrome (62826).

The spelling of 140561421 in words is "one hundred forty million, five hundred sixty-one thousand, four hundred twenty-one".