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25105061 = 191321319
BaseRepresentation
bin101111111000…
…1001010100101
31202020110200002
41133301022211
522411330221
62254031045
7423250412
oct137611245
952213602
1025105061
1113197893
1284a8485
13527cc87
143497109
15230d80b
hex17f12a5

25105061 has 4 divisors (see below), whose sum is σ = 26426400. Its totient is φ = 23783724.

The previous prime is 25105057. The next prime is 25105063. The reversal of 25105061 is 16050152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25105061 - 22 = 25105057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25105063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660641 + ... + 660678.

It is an arithmetic number, because the mean of its divisors is an integer number (6606600).

Almost surely, 225105061 is an apocalyptic number.

It is an amenable number.

25105061 is a deficient number, since it is larger than the sum of its proper divisors (1321339).

25105061 is a wasteful number, since it uses less digits than its factorization.

25105061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321338.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 25105061 is about 5010.4950853184. The cubic root of 25105061 is about 292.8108016870.

The spelling of 25105061 in words is "twenty-five million, one hundred five thousand, sixty-one".

Divisors: 1 19 1321319 25105061