102572401261 has 4 divisors (see below), whose sum is σ = 111897165024. Its totient is φ = 93247637500.

The previous prime is 102572401249. The next prime is 102572401277. The reversal of 102572401261 is 162104275201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 162104275201 = 11 ⋅14736752291.

It is a cyclic number.

It is not a de Polignac number, because 102572401261 - 2¹⁹ = 102571876973 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 (102572401961) 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, 4662381865 + ... + 4662381886.

It is an arithmetic number, because the mean of its divisors is an integer number (27974291256).

Almost surely, 2^102572401261 is an apocalyptic number.

102572401261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102572401261 is a deficient number, since it is larger than the sum of its proper divisors (9324763763).

102572401261 is an equidigital number, since it uses as much as digits as its factorization.

102572401261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324763762.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 102572401261 its reverse (162104275201), we get a palindrome (264676676462).

The spelling of 102572401261 in words is "one hundred two billion, five hundred seventy-two million, four hundred one thousand, two hundred sixty-one".