103557421 has 16 divisors (see below), whose sum is σ = 120823488. Its totient is φ = 87712000.

The previous prime is 103557371. The next prime is 103557427. The reversal of 103557421 is 124755301.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 103557421 - 2²¹ = 101460269 is a prime.

It is a super-3 number, since 3×103557421³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 103557421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103557427) 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, 16146 + ... + 21628.

It is an arithmetic number, because the mean of its divisors is an integer number (7551468).

Almost surely, 2^103557421 is an apocalyptic number.

103557421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103557421 is a deficient number, since it is larger than the sum of its proper divisors (17266067).

103557421 is a wasteful number, since it uses less digits than its factorization.

103557421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 103557421 is about 10176.3166715664. The cubic root of 103557421 is about 469.5989048249.

The spelling of 103557421 in words is "one hundred three million, five hundred fifty-seven thousand, four hundred twenty-one".