102409545 has 64 divisors (see below), whose sum is σ = 194273280. Its totient is φ = 45100800.

The previous prime is 102409543. The next prime is 102409553. The reversal of 102409545 is 545904201.

102409545 = T₄₇₆₆ + T₄₇₆₇ + ... + T₄₇₇₄.

It is not a de Polignac number, because 102409545 - 2¹ = 102409543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102409543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 377760 + ... + 378030.

It is an arithmetic number, because the mean of its divisors is an integer number (3035520).

Almost surely, 2^102409545 is an apocalyptic number.

102409545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102409545 is a deficient number, since it is larger than the sum of its proper divisors (91863735).

102409545 is a wasteful number, since it uses less digits than its factorization.

102409545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 102409545 is about 10119.7601256156. The cubic root of 102409545 is about 467.8573739902.

The spelling of 102409545 in words is "one hundred two million, four hundred nine thousand, five hundred forty-five".