102661450 has 48 divisors (see below), whose sum is σ = 199775160. Its totient is φ = 39200000.

The previous prime is 102661409. The next prime is 102661451. The reversal of 102661450 is 54166201.

102661450 = T₁₃₇₅ + T₁₃₇₆ + ... + T₁₄₇₅.

It can be written as a sum of positive squares in 12 ways, for example, as 48594841 + 54066609 = 6971^2 + 7353^2 .

It is a super-2 number, since 2×102661450² = 21078746632205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (102661451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146100 + ... + 146800.

Almost surely, 2^102661450 is an apocalyptic number.

102661450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102661450 is a deficient number, since it is larger than the sum of its proper divisors (97113710).

102661450 is a wasteful number, since it uses less digits than its factorization.

102661450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 102661450 is about 10132.1986755097. The cubic root of 102661450 is about 468.2406687005.

The spelling of 102661450 in words is "one hundred two million, six hundred sixty-one thousand, four hundred fifty".