102401421 has 8 divisors (see below), whose sum is σ = 144566784. Its totient is φ = 64251840.

The previous prime is 102401419. The next prime is 102401443. The reversal of 102401421 is 124104201.

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

It is not a de Polignac number, because 102401421 - 2¹ = 102401419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102401421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102401471) 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, 1003885 + ... + 1003986.

It is an arithmetic number, because the mean of its divisors is an integer number (18070848).

Almost surely, 2^102401421 is an apocalyptic number.

It is an amenable number.

102401421 is a deficient number, since it is larger than the sum of its proper divisors (42165363).

102401421 is a wasteful number, since it uses less digits than its factorization.

102401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007891.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 102401421 is about 10119.3587247414. The cubic root of 102401421 is about 467.8450021818.

Adding to 102401421 its reverse (124104201), we get a palindrome (226505622).

The spelling of 102401421 in words is "one hundred two million, four hundred one thousand, four hundred twenty-one".