153400421 has 8 divisors (see below), whose sum is σ = 156426744. Its totient is φ = 150390720.

The previous prime is 153400411. The next prime is 153400427. The reversal of 153400421 is 124004351.

It can be written as a sum of positive squares in 4 ways, for example, as 12859396 + 140541025 = 3586^2 + 11855^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 153400421 - 2¹⁸ = 153138277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 153400393 and 153400402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153400427) 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, 15371 + ... + 23303.

It is an arithmetic number, because the mean of its divisors is an integer number (19553343).

Almost surely, 2^153400421 is an apocalyptic number.

It is an amenable number.

153400421 is a deficient number, since it is larger than the sum of its proper divisors (3026323).

153400421 is an equidigital number, since it uses as much as digits as its factorization.

153400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8311.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 153400421 is about 12385.4923600154. The cubic root of 153400421 is about 535.3143068250.

Adding to 153400421 its reverse (124004351), we get a palindrome (277404772).

The spelling of 153400421 in words is "one hundred fifty-three million, four hundred thousand, four hundred twenty-one".