102649450 has 12 divisors (see below), whose sum is σ = 190928070. Its totient is φ = 41059760.

The previous prime is 102649429. The next prime is 102649489. The reversal of 102649450 is 54946201.

It can be written as a sum of positive squares in 3 ways, for example, as 77035729 + 25613721 = 8777^2 + 5061^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1026445 + ... + 1026544.

Almost surely, 2^102649450 is an apocalyptic number.

102649450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102649450 is a deficient number, since it is larger than the sum of its proper divisors (88278620).

102649450 is a wasteful number, since it uses less digits than its factorization.

102649450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053001 (or 2052996 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 102649450 is about 10131.6064866338. The cubic root of 102649450 is about 468.2224239197. Note that the first 3 decimals are identical.

The spelling of 102649450 in words is "one hundred two million, six hundred forty-nine thousand, four hundred fifty".