420955642 has 4 divisors (see below), whose sum is σ = 631433466. Its totient is φ = 210477820.

The previous prime is 420955607. The next prime is 420955643. The reversal of 420955642 is 246559024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 234059401 + 186896241 = 15299^2 + 13671^2 .

It is not an unprimeable number, because it can be changed into a prime (420955643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105238909 + ... + 105238912.

Almost surely, 2^420955642 is an apocalyptic number.

420955642 is a deficient number, since it is larger than the sum of its proper divisors (210477824).

420955642 is a wasteful number, since it uses less digits than its factorization.

420955642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210477823.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 420955642 is about 20517.2035618892. The cubic root of 420955642 is about 749.4547990298.

The spelling of 420955642 in words is "four hundred twenty million, nine hundred fifty-five thousand, six hundred forty-two".