421153557 has 8 divisors (see below), whose sum is σ = 612587040. Its totient is φ = 255244560.

The previous prime is 421153547. The next prime is 421153591. The reversal of 421153557 is 755351124.

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

It is not a de Polignac number, because 421153557 - 2¹⁴ = 421137173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 12762229 = 421153557 / (4 + 2 + 1 + 1 + 5 + 3 + 5 + 5 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421153547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6381082 + ... + 6381147.

It is an arithmetic number, because the mean of its divisors is an integer number (76573380).

Almost surely, 2^421153557 is an apocalyptic number.

It is an amenable number.

421153557 is a deficient number, since it is larger than the sum of its proper divisors (191433483).

421153557 is a wasteful number, since it uses less digits than its factorization.

421153557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12762243.

The product of its digits is 21000, while the sum is 33.

The square root of 421153557 is about 20522.0261426595. The cubic root of 421153557 is about 749.5722342906.

The spelling of 421153557 in words is "four hundred twenty-one million, one hundred fifty-three thousand, five hundred fifty-seven".