194252421 has 16 divisors (see below), whose sum is σ = 299170368. Its totient is φ = 110803200.

The previous prime is 194252419. The next prime is 194252423. The reversal of 194252421 is 124252491.

It is an interprime number because it is at equal distance from previous prime (194252419) and next prime (194252423).

It is not a de Polignac number, because 194252421 - 2¹ = 194252419 is a prime.

It is a super-2 number, since 2×194252421² = 75468006128722482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194252423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172570 + ... + 173691.

It is an arithmetic number, because the mean of its divisors is an integer number (18698148).

Almost surely, 2^194252421 is an apocalyptic number.

194252421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194252421 is a deficient number, since it is larger than the sum of its proper divisors (104917947).

194252421 is a wasteful number, since it uses less digits than its factorization.

194252421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346292.

The product of its digits is 5760, while the sum is 30.

The square root of 194252421 is about 13937.4467173869. The cubic root of 194252421 is about 579.1470031613.

The spelling of 194252421 in words is "one hundred ninety-four million, two hundred fifty-two thousand, four hundred twenty-one".