102561494 has 16 divisors (see below), whose sum is σ = 176247456. Its totient is φ = 43848000.

The previous prime is 102561469. The next prime is 102561499. The reversal of 102561494 is 494165201.

It is a self number, because there is not a number n which added to its sum of digits gives 102561494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102561499) 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, 2807 + ... + 14594.

It is an arithmetic number, because the mean of its divisors is an integer number (11015466).

Almost surely, 2^102561494 is an apocalyptic number.

102561494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

102561494 is a deficient number, since it is larger than the sum of its proper divisors (73685962).

102561494 is a wasteful number, since it uses less digits than its factorization.

102561494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17831.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 102561494 is about 10127.2648824843. The cubic root of 102561494 is about 468.0886523318.

The spelling of 102561494 in words is "one hundred two million, five hundred sixty-one thousand, four hundred ninety-four".