102042451 has 6 divisors (see below), whose sum is σ = 118702500. Its totient is φ = 87464916.

The previous prime is 102042433. The next prime is 102042461. The reversal of 102042451 is 154240201.

It is not a de Polignac number, because 102042451 - 2⁵ = 102042419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102042431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1041201 + ... + 1041298.

It is an arithmetic number, because the mean of its divisors is an integer number (19783750).

Almost surely, 2^102042451 is an apocalyptic number.

102042451 is a deficient number, since it is larger than the sum of its proper divisors (16660049).

102042451 is an equidigital number, since it uses as much as digits as its factorization.

102042451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082513 (or 2082506 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 102042451 is about 10101.6063574067. The cubic root of 102042451 is about 467.2976824816.

Adding to 102042451 its reverse (154240201), we get a palindrome (256282652).

The spelling of 102042451 in words is "one hundred two million, forty-two thousand, four hundred fifty-one".