61402001 has 2 divisors, whose sum is σ = 61402002. Its totient is φ = 61402000.

The previous prime is 61401983. The next prime is 61402021. The reversal of 61402001 is 10020416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60824401 + 577600 = 7799^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 61402001 - 2²² = 57207697 is a prime.

It is not a weakly prime, because it can be changed into another prime (61402021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30701000 + 30701001.

It is an arithmetic number, because the mean of its divisors is an integer number (30701001).

Almost surely, 2^61402001 is an apocalyptic number.

It is an amenable number.

61402001 is a deficient number, since it is larger than the sum of its proper divisors (1).

61402001 is an equidigital number, since it uses as much as digits as its factorization.

61402001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 61402001 is about 7835.9428915734. The cubic root of 61402001 is about 394.5125665118.

Adding to 61402001 its reverse (10020416), we get a palindrome (71422417).

The spelling of 61402001 in words is "sixty-one million, four hundred two thousand, one".