102545453421 has 12 divisors (see below), whose sum is σ = 148684412448. Its totient is φ = 68103696264.

The previous prime is 102545453411. The next prime is 102545453429. The reversal of 102545453421 is 124354545201.

102545453421 is a `hidden beast` number, since 1 + 0 + 2 + 54 + 54 + 534 + 21 = 666.

It is not a de Polignac number, because 102545453421 - 2⁵ = 102545453389 is a prime.

It is a super-5 number, since 5×102545453421⁵ (a number of 56 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102545453429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21659115 + ... + 21663848.

It is an arithmetic number, because the mean of its divisors is an integer number (12390367704).

Almost surely, 2^102545453421 is an apocalyptic number.

It is an amenable number.

102545453421 is a deficient number, since it is larger than the sum of its proper divisors (46138959027).

102545453421 is a wasteful number, since it uses less digits than its factorization.

102545453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43323232 (or 43323229 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 102545453421 its reverse (124354545201), we get a palindrome (226899998622).

The spelling of 102545453421 in words is "one hundred two billion, five hundred forty-five million, four hundred fifty-three thousand, four hundred twenty-one".