421292493 has 6 divisors (see below), whose sum is σ = 608533614. Its totient is φ = 280861656.

The previous prime is 421292477. The next prime is 421292503. The reversal of 421292493 is 394292124.

421292493 is a `hidden beast` number, since 42 + 129 + 2 + 493 = 666.

It can be written as a sum of positive squares in only one way, i.e., 306845289 + 114447204 = 17517^2 + 10698^2 .

It is not a de Polignac number, because 421292493 - 2⁴ = 421292477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421292093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23405130 + ... + 23405147.

It is an arithmetic number, because the mean of its divisors is an integer number (101422269).

Almost surely, 2^421292493 is an apocalyptic number.

It is an amenable number.

421292493 is a deficient number, since it is larger than the sum of its proper divisors (187241121).

421292493 is a wasteful number, since it uses less digits than its factorization.

421292493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46810283 (or 46810280 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 421292493 is about 20525.4109094069. The cubic root of 421292493 is about 749.6546516704.

The spelling of 421292493 in words is "four hundred twenty-one million, two hundred ninety-two thousand, four hundred ninety-three".