421942949 has 4 divisors (see below), whose sum is σ = 423317664. Its totient is φ = 420568236.

The previous prime is 421942933. The next prime is 421942973. The reversal of 421942949 is 949249124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421942949 - 2⁴ = 421942933 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 (421942999) 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, 686897 + ... + 687510.

It is an arithmetic number, because the mean of its divisors is an integer number (105829416).

Almost surely, 2^421942949 is an apocalyptic number.

It is an amenable number.

421942949 is a deficient number, since it is larger than the sum of its proper divisors (1374715).

421942949 is a wasteful number, since it uses less digits than its factorization.

421942949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374714.

The product of its digits is 186624, while the sum is 44.

The square root of 421942949 is about 20541.2499376255. The cubic root of 421942949 is about 750.0402639125.

The spelling of 421942949 in words is "four hundred twenty-one million, nine hundred forty-two thousand, nine hundred forty-nine".