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1225257061 = 71395212417
BaseRepresentation
bin100100100000111…
…1111000001100101
310011101112111201011
41021001333001211
510002131211221
6321325302221
742235341010
oct11101770145
93141474634
101225257061
11579697846
122a2404971
13166ac86a2
14b8a26377
15728791e1
hex4907f065

1225257061 has 16 divisors (see below), whose sum is σ = 1413659520. Its totient is φ = 1040232960.

The previous prime is 1225257043. The next prime is 1225257067. The reversal of 1225257061 is 1607525221.

It is a cyclic number.

It is not a de Polignac number, because 1225257061 - 211 = 1225255013 is a prime.

It is a super-3 number, since 3×12252570613 (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225257067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505725 + ... + 508141.

It is an arithmetic number, because the mean of its divisors is an integer number (88353720).

Almost surely, 21225257061 is an apocalyptic number.

It is an amenable number.

1225257061 is a deficient number, since it is larger than the sum of its proper divisors (188402459).

1225257061 is a wasteful number, since it uses less digits than its factorization.

1225257061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1225257061 is about 35003.6721073661. The cubic root of 1225257061 is about 1070.0623194262.

The spelling of 1225257061 in words is "one billion, two hundred twenty-five million, two hundred fifty-seven thousand, sixty-one".