421172497 has 8 divisors (see below), whose sum is σ = 429674112. Its totient is φ = 412742400.

The previous prime is 421172483. The next prime is 421172537. The reversal of 421172497 is 794271124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421172497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421172197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5904 + ... + 29617.

It is an arithmetic number, because the mean of its divisors is an integer number (53709264).

Almost surely, 2^421172497 is an apocalyptic number.

It is an amenable number.

421172497 is a deficient number, since it is larger than the sum of its proper divisors (8501615).

421172497 is a wasteful number, since it uses less digits than its factorization.

421172497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35759.

The product of its digits is 28224, while the sum is 37.

The square root of 421172497 is about 20522.4875928821. The cubic root of 421172497 is about 749.5834706398.

The spelling of 421172497 in words is "four hundred twenty-one million, one hundred seventy-two thousand, four hundred ninety-seven".